Grade 2

1. Counting numbers to 1,000

Practice counting numbers to 1,000

• Easy How many units do the hundred flats, ten rods and unit cubes represent? e.g. How many units do the hundred flats, ten rods and unit cubes represent? —Accuracy · last 5 attempts
• Normal Complete the sequence: {sequence} e.g. Complete the sequence: 119, 118, 117, ?, ? —Accuracy · last 5 attempts
• Hard Which number is out of place in {sequence}? e.g. Which number is out of place in 198, 199, 200, 211, 202? —Accuracy · last 5 attempts

2. Reading and writing numbers to 1,000 Member only

Practice reading and writing numbers to 1,000

• Easy How do you read {n}? e.g. How do you read 755? —Accuracy · last 5 attempts
• Normal How do you read {n}? e.g. How do you read 201? —Accuracy · last 5 attempts
• Hard A learner writes “{word}” as {wrong}. What is the error? e.g. A learner writes “two hundred and one” as 21. What is the error? —Accuracy · last 5 attempts

3. Hundreds, tens and ones Member only

Practice hundreds, tens and ones

• Easy Which digit is in the hundreds place of {n}? e.g. Which digit is in the hundreds place of 755? —Accuracy · last 5 attempts
• Normal What number is {h} hundreds, {ten} tens and {one} ones? e.g. What number is 2 hundreds, 0 tens and 1 ones? —Accuracy · last 5 attempts
• Hard Regroup {h} hundreds and {ten} tens into hundreds and tens. e.g. Regroup 1 hundreds and 10 tens into hundreds and tens. —Accuracy · last 5 attempts

4. Digit values and expanded form Member only

Practice digit values and expanded form

• Easy What is the value of digit {digit} in the {place} place of {n}? e.g. What is the value of digit 7 in the Hundreds place of 755? —Accuracy · last 5 attempts
• Normal Fill both blanks in order: {n} = {hv} + __ + __ e.g. Fill both blanks in order: 755 = 700 + __ + __ —Accuracy · last 5 attempts
• Hard The first two digits in {n} are identical, so their values are equal. Is this correct? e.g. The first two digits in 220 are identical, so their values are equal. Is this correct? —Accuracy · last 5 attempts

5. Comparing numbers to 1,000 Member only

Practice comparing numbers to 1,000

• Easy Fill >, < or =: {a} __ {b} e.g. Fill >, < or =: 215 __ 126 —Accuracy · last 5 attempts
• Normal Fill >, < or =: {a} __ {b} e.g. Fill >, < or =: 530 __ 520 —Accuracy · last 5 attempts
• Hard Is {a} > {b} correct? e.g. Is 689 > 712 correct? —Accuracy · last 5 attempts

6. Ordering and number-line positions Member only

Practice ordering and number-line positions

• Easy Order {values} from least to greatest. e.g. Order 859, 381, 350 from least to greatest. —Accuracy · last 5 attempts
• Normal Order {values} from least to greatest. e.g. Order 517, 594, 513, 586 from least to greatest. —Accuracy · last 5 attempts
• Hard Correct the order of {values} from least to greatest. e.g. Correct the order of 381, 350, 328 from least to greatest. —Accuracy · last 5 attempts

7. Number patterns Member only

Practice number patterns

• Easy Complete the sequence: {sequence} e.g. Complete the sequence: 119, 120, 121, ?, ? —Accuracy · last 5 attempts
• Normal Complete the sequence: {sequence} e.g. Complete the sequence: 155, 165, 175, ?, ? —Accuracy · last 5 attempts
• Hard Which number is out of place in {sequence}? e.g. Which number is out of place in 198, 298, 398, 508, 598? —Accuracy · last 5 attempts

1. Addition without regrouping Member only

Practice addition without regrouping

• Easy {a} + {b} = ? e.g. 700 + 200 = ? —Accuracy · last 5 attempts
• Normal Choose the hundreds, tens and ones partial results, in order, for {a} {op} {b}. e.g. Choose the hundreds, tens and ones partial results, in order, for 754 + 214. —Accuracy · last 5 attempts
• Hard How should the digits be aligned for {a} {op} {b}? e.g. How should the digits be aligned for 754 + 214? —Accuracy · last 5 attempts

2. Addition with regrouping Member only

Practice addition with regrouping

• Easy Regroup {units} ones into tens and ones. e.g. Regroup 13 ones into tens and ones. —Accuracy · last 5 attempts
• Normal {a} + {b} = ? e.g. 125 + 859 = ? —Accuracy · last 5 attempts
• Hard {a} + {b} = ? e.g. 658 + 189 = ? —Accuracy · last 5 attempts

3. Subtraction without regrouping Member only

Practice subtraction without regrouping

• Easy {a} − {b} = ? e.g. 700 − 200 = ? —Accuracy · last 5 attempts
• Normal Choose the hundreds, tens and ones partial results, in order, for {a} {op} {b}. e.g. Choose the hundreds, tens and ones partial results, in order, for 754 - 214. —Accuracy · last 5 attempts
• Hard How should the digits be aligned for {a} {op} {b}? e.g. How should the digits be aligned for 754 - 214? —Accuracy · last 5 attempts

4. Subtraction with regrouping Member only

Practice subtraction with regrouping

• Easy {n} = {h} hundreds, ({ten}−1) tens and __ ones, with no change in value. e.g. 275 = 2 hundreds, (7−1) tens and __ ones, with no change in value. —Accuracy · last 5 attempts
• Normal {a} − {b} = ? e.g. 384 − 106 = ? —Accuracy · last 5 attempts
• Hard {a} − {b} = ? e.g. 658 − 189 = ? —Accuracy · last 5 attempts

5. Addition and subtraction strategies Member only

Practice addition and subtraction strategies

• Easy Choose the hundreds, tens and ones partial results for {a} {op} {b}. e.g. Choose the hundreds, tens and ones partial results for 754 + 214. —Accuracy · last 5 attempts
• Normal Round {a} up to {round}, then compensate. Which expression equals {a}+{b}? e.g. Round 197 up to 200, then compensate. Which expression equals 197+170? —Accuracy · last 5 attempts
• Hard Replace {b} by {round}, then compensate. Which expression equals {a}−{b}? e.g. Replace 197 by 200, then compensate. Which expression equals 481−197? —Accuracy · last 5 attempts

6. Addition–subtraction relationships Member only

Practice addition–subtraction relationships

• Easy Given {a}+{b}={sum}, which expression finds {b}? e.g. Given 132+130=262, which expression finds 130? —Accuracy · last 5 attempts
• Normal Which subtraction finds the blank in __+{b}={sum}? e.g. Which subtraction finds the blank in __+130=262? —Accuracy · last 5 attempts
• Hard A learner uses {sum}+{b} to check {sum}−{b}={a}. What principle should be used instead? e.g. A learner uses 262+130 to check 262−130=132. What principle should be used instead? —Accuracy · last 5 attempts

7. Missing values and checking answers Member only

Practice missing values and checking answers

• Easy Check {a}+{b}={sum}: what is {sum}−{a}? e.g. Check 132+130=262: what is 262−132? —Accuracy · last 5 attempts
• Normal {a}+__={sum} e.g. 125+__=984 —Accuracy · last 5 attempts
• Hard {a} − {b} = ? e.g. 658 − 189 = ? —Accuracy · last 5 attempts

8. Addition and subtraction situations Member only

Practice addition and subtraction situations

• Easy There are {a} red objects and {b} blue objects. Choose the expression for the total. e.g. There are 132 red objects and 130 blue objects. Choose the expression for the total. —Accuracy · last 5 attempts
• Normal A has {total} objects and B has {b}. Choose the expression for how many more A has. e.g. A has 984 objects and B has 859. Choose the expression for how many more A has. —Accuracy · last 5 attempts
• Hard Start with {a} objects, add {b}, then add {c}. Choose the expression in event order. e.g. Start with 157 objects, add 135, then add 45. Choose the expression in event order. —Accuracy · last 5 attempts

1. Measuring in centimeters Member only

Practice measuring in centimeters

• Easy How long is the object in centimeters? e.g. How long is the object in centimeters? —Accuracy · last 5 attempts
• Normal How long is the object in centimeters? e.g. How long is the object in centimeters? —Accuracy · last 5 attempts
• Hard An object is {length} cm long and ends at {end} cm. At which mark does it start? e.g. An object is 6 cm long and ends at 8 cm. At which mark does it start? —Accuracy · last 5 attempts

2. Measuring in meters Member only

Practice measuring in meters

• Easy Which unit is abbreviated as {large}? e.g. Which unit is abbreviated as m? —Accuracy · last 5 attempts
• Normal Read the instrument. How long is the object in {large}? e.g. Read the instrument. How long is the object in m? —Accuracy · last 5 attempts
• Hard Is {value} {wrong_unit} a reasonable measurement for {object}? e.g. Is 8 cm a reasonable measurement for a classroom? —Accuracy · last 5 attempts

3. Meters and centimeters Member only

Practice meters and centimeters

• Easy How many {small} equal 1 {large}? e.g. How many cm equal 1 m? —Accuracy · last 5 attempts
• Normal {h} {large} = __ {small} e.g. 3 m = __ cm —Accuracy · last 5 attempts
• Hard Why does 1 {large} equal {factor} {small}? e.g. Why does 1 m equal 100 cm? —Accuracy · last 5 attempts

4. Choosing units and instruments Member only

Practice choosing units and instruments

• Easy Which unit is usually suitable for measuring {object}? e.g. Which unit is usually suitable for measuring a pencil? —Accuracy · last 5 attempts
• Normal Choose an appropriate instrument for measuring {object}. e.g. Choose an appropriate instrument for measuring a table. —Accuracy · last 5 attempts
• Hard Is {value} {wrong_unit} a reasonable measurement for {object}? e.g. Is 120 m a reasonable measurement for a table? —Accuracy · last 5 attempts

5. Comparing and ordering lengths Member only

Practice comparing and ordering lengths

• Easy {a} {small} __ {b} {small} e.g. 24 cm __ 13 cm —Accuracy · last 5 attempts
• Normal {a} {small} __ {b} {large} e.g. 29 cm __ 1 m —Accuracy · last 5 attempts
• Hard A, B and C respectively measure {values}. Order their labels from least to greatest. e.g. A, B and C respectively measure 90 cm, 1 m, 80 cm. Order their labels from least to greatest. —Accuracy · last 5 attempts

6. Calculations with length Member only

Practice calculations with length

• Easy {a} {small} + {b} {small} = __ {small} e.g. 24 cm + 13 cm = __ cm —Accuracy · last 5 attempts
• Normal A measures {a} {small} and B measures {b} {small}. What is the difference in {small}? e.g. A measures 24 cm and B measures 13 cm. What is the difference in cm? —Accuracy · last 5 attempts
• Hard 1 {large} − {b} {small} = __ {small} e.g. 1 m − 13 cm = __ cm —Accuracy · last 5 attempts

7. Length situations Member only

Practice length situations

• Easy Two portions of {material} measure {a} {small} and {b} {small}. Choose the expression for their total. e.g. Two portions of rope measure 24 cm and 13 cm. Choose the expression for their total. —Accuracy · last 5 attempts
• Normal A measures {a} {story_unit} and B measures {b} {story_unit}. Choose the expression for their difference. e.g. A measures 24 cm and B measures 13 cm. Choose the expression for their difference. —Accuracy · last 5 attempts
• Hard There is 1 {large} of {material}; {b} {small} are used. Choose the expression for the remainder in {small}. e.g. There is 1 m of rope; 13 cm are used. Choose the expression for the remainder in cm. —Accuracy · last 5 attempts

1. Measuring in kilograms Member only

Practice measuring in kilograms

• Easy Which unit is abbreviated as {large}? e.g. Which unit is abbreviated as kg? —Accuracy · last 5 attempts
• Normal Which scale shows {value} {unit}? e.g. Which scale shows 4 kg? —Accuracy · last 5 attempts
• Hard The scale from {start} to {end} {unit} has {intervals} equal intervals. How many {unit} does each interval represent? e.g. The scale from 0 to 10 kg has 10 equal intervals. How many kg does each interval represent? —Accuracy · last 5 attempts

2. Measuring in grams Member only

Practice measuring in grams

• Easy What quantity is measured in {small}? e.g. What quantity is measured in g? —Accuracy · last 5 attempts
• Normal Which scale shows {value} {unit}? e.g. Which scale shows 40 g? —Accuracy · last 5 attempts
• Hard The scale from {start} to {end} {unit} has {intervals} equal intervals. How many {unit} does each interval represent? e.g. The scale from 0 to 100 g has 10 equal intervals. How many g does each interval represent? —Accuracy · last 5 attempts

3. Kilograms and grams Member only

Practice kilograms and grams

• Easy How many {small} equal 1 {large}? e.g. How many g equal 1 kg? —Accuracy · last 5 attempts
• Normal {h} {large} = __ {small} e.g. 1 kg = __ g —Accuracy · last 5 attempts
• Hard Why does 1 {large} equal {factor} {small}? e.g. Why does 1 kg equal 1000 g? —Accuracy · last 5 attempts

4. Choosing units and scales Member only

Practice choosing units and scales

• Easy Which unit is usually suitable for measuring {object}? e.g. Which unit is usually suitable for measuring an eraser? —Accuracy · last 5 attempts
• Normal Choose an appropriate instrument for measuring {object}. e.g. Choose an appropriate instrument for measuring several kilograms of fruit. —Accuracy · last 5 attempts
• Hard Why is a larger unit than grams usually used for the weight of {object}? e.g. Why is a larger unit than grams usually used for the weight of a car? —Accuracy · last 5 attempts

5. Comparing and ordering weights Member only

Practice comparing and ordering weights

• Easy {a} {small} __ {b} {small} e.g. 754 g __ 214 g —Accuracy · last 5 attempts
• Normal {a} {small} __ {b} {large} e.g. 251 g __ 1 kg —Accuracy · last 5 attempts
• Hard A, B and C respectively measure {values}. Order their labels from least to greatest. e.g. A, B and C respectively measure 990 g, 1 kg, 980 g. Order their labels from least to greatest. —Accuracy · last 5 attempts

6. Calculations with weight Member only

Practice calculations with weight

• Easy {a} {small} + {b} {small} = __ {small} e.g. 754 g + 214 g = __ g —Accuracy · last 5 attempts
• Normal A measures {a} {small} and B measures {b} {small}. What is the difference in {small}? e.g. A measures 754 g and B measures 214 g. What is the difference in g? —Accuracy · last 5 attempts
• Hard 1 {large} − {b} {small} = __ {small} e.g. 1 kg − 214 g = __ g —Accuracy · last 5 attempts

7. Weight situations Member only

Practice weight situations

• Easy Two portions of {material} measure {a} {small} and {b} {small}. Choose the expression for their total. e.g. Two portions of flour measure 754 g and 214 g. Choose the expression for their total. —Accuracy · last 5 attempts
• Normal A measures {a} {story_unit} and B measures {b} {story_unit}. Choose the expression for their difference. e.g. A measures 5 kg and B measures 3 kg. Choose the expression for their difference. —Accuracy · last 5 attempts
• Hard There is 1 {large} of {material}; {b} {small} are used. Choose the expression for the remainder in {small}. e.g. There is 1 kg of flour; 214 g are used. Choose the expression for the remainder in g. —Accuracy · last 5 attempts

1. Multiplication as equal groups Member only

Practice Multiplication as equal groups

• Easy There are 4 equal groups of 6 objects. How many objects altogether? e.g. มีจาน 3 ใบ แต่ละใบมีส้ม 4 ผล มีส้มทั้งหมดกี่ผล —Accuracy · last 5 attempts
• Normal With the number of groups first, which picture represents 8 × 9? e.g. ภาพใดแสดง 4×3 —Accuracy · last 5 attempts
• Hard There are 5 groups of 8. A child uses 5+8. Which correction is appropriate? e.g. มี 4 กลุ่ม กลุ่มละ 3 เด็กคำนวณ 4+3=7 ผิดอย่างไร —Accuracy · last 5 attempts

2. Multiplication expressions Member only

Practice Multiplication expressions

• Easy There are 8 boxes with 5 objects each. Choose the calculation for the total. e.g. 5 กลุ่ม กลุ่มละ 3 เขียนประโยคการคูณ —Accuracy · last 5 attempts
• Normal With the number of groups first, which picture represents 2 × 5? e.g. ภาพใดตรงกับ 3×6 —Accuracy · last 5 attempts
• Hard There are 8 groups of 8. A child uses 8+8. Which correction is appropriate? e.g. ภาพมี 3 กลุ่ม กลุ่มละ 5 แต่เด็กเขียน 3+5 ผิดตรงไหน —Accuracy · last 5 attempts

3. Multiplication by one and zero Member only

Practice Multiplication by one and zero

• Easy 5 × 1 = ? e.g. 7×1=? —Accuracy · last 5 attempts
• Normal 8 × __ = 0. Find the missing number. e.g. 7×__=0 —Accuracy · last 5 attempts
• Hard Why must 7 × 0 equal zero? e.g. เด็กตอบ 8×0=8 เพราะคิดว่า “คูณศูนย์ไม่เปลี่ยนค่า” สับสนกับสมบัติใด —Accuracy · last 5 attempts

4. Multiplication facts Member only

Practice Multiplication facts

• Easy 2 × 5 = ? e.g. 2×7=? —Accuracy · last 5 attempts
• Normal 3 × 6 = ? e.g. 4×6=? —Accuracy · last 5 attempts
• Hard To find or check 8 × 9, select an equivalent calculation. e.g. ต้องการหา 6×7 fact ใดช่วยคิดได้ —Accuracy · last 5 attempts

5. Multiplication by multiples of ten Member only

Practice Multiplication by multiples of ten

• Easy 8 × 10 = ? e.g. 4×10=? —Accuracy · last 5 attempts
• Normal 3 × 60 = ? e.g. 7×30=? —Accuracy · last 5 attempts
• Hard How should place value be used for 7 × 60? e.g. ทำไม 4×20 จึงไม่เท่ากับ 4×2 —Accuracy · last 5 attempts

6. One digit times two digits Member only

Practice One digit times two digits

• Easy 40 = __ + 0. Fill in the tens value. e.g. 23 = 20+3 —Accuracy · last 5 attempts
• Normal Which decomposition correctly calculates 7 × 22? e.g. 3×24 = (3×20)+(3×4) —Accuracy · last 5 attempts
• Hard Which decomposition correctly calculates 7 × 14? e.g. เด็กทำ 3×24 = 6+12=18 เพราะคิด 3×20=6 ผิดตรงไหน —Accuracy · last 5 attempts

7. Missing multiplication values Member only

Practice Missing multiplication values

• Easy 4 × 9 = ? e.g. 6×7=__ —Accuracy · last 5 attempts
• Normal __ × 2 = 10. Find the missing factor. e.g. __×5=30 —Accuracy · last 5 attempts
• Hard __ × 2 = 10. Find the missing factor. e.g. __×5=35 จำนวนที่หายมากกว่าหรือน้อยกว่า 10 —Accuracy · last 5 attempts

8. Multiplication situations Member only

Practice Multiplication situations

• Easy There are 3 boxes with 7 objects each. Choose the model for the total. e.g. มีถุง 4 ถุง ถุงละ 6 ลูก มีทั้งหมดกี่ลูก —Accuracy · last 5 attempts
• Normal There are 2 boxes with 50 objects each. Choose the model for the total. e.g. มีกล่อง 4 กล่อง กล่องละ 20 ชิ้น มีทั้งหมดกี่ชิ้น —Accuracy · last 5 attempts
• Hard There are 8 boxes of 2 objects and 3 extra objects. Choose the total model. e.g. มีลูกบอล 3 ถุง ถุงละ 20 ลูก และมีอีก 15 ลูก รวมทั้งหมดกี่ลูก —Accuracy · last 5 attempts

1. Division by equal sharing Member only

Practice Division by equal sharing

• Easy Share 24 objects equally among 6 people. How many per person? e.g. มีลูกบอล 12 ลูก แบ่งให้เด็ก 3 คนเท่า ๆ กัน คนละกี่ลูก —Accuracy · last 5 attempts
• Normal Share 40 objects equally among 8 people. How many per person? e.g. 12 ชิ้นแบ่งเป็น 3 กลุ่ม กลุ่มละ 4 แทนด้วย 12÷3=4 —Accuracy · last 5 attempts
• Hard Share 56 objects among 8 people. One gets 7+1 and another 7-1. Is this equal sharing? e.g. เด็กแบ่ง 12 เป็น 5,4,3 แล้วบอกว่าหารด้วย 3 ได้ ผิดอย่างไร —Accuracy · last 5 attempts

2. Division by equal grouping Member only

Practice Division by equal grouping

• Easy Put 12 objects into groups of 4. How many groups? e.g. มีลูกบอล 12 ลูก จัดกลุ่มละ 3 ลูก ได้กี่กลุ่ม —Accuracy · last 5 attempts
• Normal Put 32 objects into groups of 4. How many groups? e.g. 20 ชิ้น กลุ่มละ 4 ได้ 5 กลุ่ม เขียนเป็นการหารอย่างไร —Accuracy · last 5 attempts
• Hard For 64 objects in groups of 8, does the quotient describe the number of groups or the group size? e.g. 24 ชิ้นจัดกลุ่มละ 6 เด็กตอบ “กลุ่มละ 4” ทั้งที่คำถามถามจำนวนกลุ่ม ผิดตรงไหน —Accuracy · last 5 attempts

3. Division expressions Member only

Practice Division expressions

• Easy Share 32 objects equally among 8 people. How many per person? e.g. 15 ลูกแบ่งให้ 3 คนเท่ากัน เขียนประโยคการหาร —Accuracy · last 5 attempts
• Normal There are 8 objects, 4 per bag. Choose the model for the number of bags. e.g. ภาพใดตรงกับ 12÷4=3 —Accuracy · last 5 attempts
• Hard There are 72 objects, 9 per bag. Choose the model for the number of bags. e.g. มี 20 ลูกแบ่ง 4 คน เด็กเขียน 20−4 ผิดตรงไหน —Accuracy · last 5 attempts

4. Multiplication and division Member only

Practice Multiplication and division

• Easy Given 5 × 6 = 30, find 30 ÷ 6. e.g. ถ้า 4×6=24 แล้ว 24÷6=? —Accuracy · last 5 attempts
• Normal Choose the equation checking 56 ÷ 8 = 7 remainder 0. e.g. จาก 5, 7, 35 เขียนประโยคคูณและหารที่สัมพันธ์กัน —Accuracy · last 5 attempts
• Hard Choose the equation checking 6 ÷ 2 = 3 remainder 0. e.g. เด็กใช้ 42+7 ตรวจ 42÷7=6 ผิดอย่างไร —Accuracy · last 5 attempts

5. Exact division Member only

Practice Exact division

• Easy 6 ÷ 2 = ? e.g. 16÷2=? —Accuracy · last 5 attempts
• Normal 64 ÷ 8 = ? e.g. 36÷6=? —Accuracy · last 5 attempts
• Hard The model 48 ÷ 6 is correct, but the child answers 9. What needs correcting? e.g. เด็กตอบ 42÷6=8 ควรใช้ multiplication fact ใดตรวจ —Accuracy · last 5 attempts

6. Division with remainders Member only

Practice Division with remainders

• Easy What are the quotient and remainder of 13 ÷ 4? (Choose quotient, remainder.) e.g. มีลูกบอล 14 ลูก แบ่งให้ 3 คนเท่า ๆ กัน คนละกี่ลูก เหลือกี่ลูก —Accuracy · last 5 attempts
• Normal What are the quotient and remainder of 29 ÷ 8? (Choose quotient, remainder.) e.g. 14÷4 ได้เท่าไรและเหลือเท่าไร —Accuracy · last 5 attempts
• Hard Why must 23 ÷ 6 = 2 remainder 11 be corrected? e.g. 17÷5 = 2 เศษ 7 เป็นไปได้หรือไม่ —Accuracy · last 5 attempts

7. Missing values and checking division Member only

Practice Missing values and checking division

• Easy 64 ÷ 8 = ? e.g. 24÷6=__ —Accuracy · last 5 attempts
• Normal __ ÷ 9 = 7. Find the dividend. e.g. __÷5=6 —Accuracy · last 5 attempts
• Hard 36 ÷ 5 = __ remainder 1. Find the quotient. e.g. 23÷5=__ เศษ 3 —Accuracy · last 5 attempts

8. Division situations Member only

Practice Division situations

• Easy Share 32 objects equally among 8 people. How many per person? e.g. มีขนม 24 ชิ้น แบ่งให้เด็ก 6 คนเท่า ๆ กัน คนละกี่ชิ้น —Accuracy · last 5 attempts
• Normal For 12 objects in groups of 4, does the quotient describe the number of groups or the group size? e.g. “24 ชิ้นแบ่งให้ 4 คน” กับ “24 ชิ้นใส่ถุงละ 4” ถามหาสิ่งเดียวกันหรือไม่ —Accuracy · last 5 attempts
• Hard There are 58 students and 7 seats per vehicle. What is the minimum number of vehicles? e.g. มีนักเรียน 17 คน รถคันละ 4 คน ต้องใช้รถอย่างน้อยกี่คัน —Accuracy · last 5 attempts

1. Clock parts and time units Member only

Practice Clock parts and time units

• Easy What does the short hand tell us? e.g. เข็มสั้นของนาฬิกาใช้บอกอะไร —Accuracy · last 5 attempts
• Normal How many hours are 60 minutes? e.g. 120 นาทีเท่ากับกี่ชั่วโมง —Accuracy · last 5 attempts
• Hard A child says one hour is 100 minutes. Is this correct? e.g. เด็กคิดว่า 1 ชั่วโมง = 100 นาที เพราะ 1 บาท = 100 สตางค์ ผิดตรงไหน —Accuracy · last 5 attempts

2. Reading clock times Member only

Practice Reading clock times

• Easy What time does this clock show (in the morning)? e.g. เข็มสั้นชี้ 8 เข็มยาวชี้ 12 เป็นเวลาเท่าไร —Accuracy · last 5 attempts
• Normal What time does this clock show (in the morning)? e.g. นาฬิกาแสดง 7:15 เป็นเวลาเท่าไร —Accuracy · last 5 attempts
• Hard The minute hand points to 3; a child reads 3 minutes. Is that correct? e.g. เข็มยาวชี้เลข 4 เด็กตอบ 4 นาที ผิดอย่างไร —Accuracy · last 5 attempts

3. Time representations Member only

Practice Time representations

• Easy How is 07:55 read? e.g. 8:30 อ่านว่าอย่างไร —Accuracy · last 5 attempts
• Normal What time does this clock show (in the morning)? e.g. จากหน้าปัด เขียนเวลาเป็น __:__ —Accuracy · last 5 attempts
• Hard The minute hand points to 5; a child reads 5 minutes. Is that correct? e.g. เด็กวางเข็มยาวที่เลข 3 เพื่อแสดง 3 นาที ผิดอย่างไร —Accuracy · last 5 attempts

4. Times and event order Member only

Practice Times and event order

• Easy In 24-hour notation, which part of the day is 07:00? e.g. เวลา 7:00 เหมาะกับกิจกรรมใด —Accuracy · last 5 attempts
• Normal Order 03:50, 02:50, 03:20 from earliest to latest on the same day. e.g. ตื่น 6:30, เรียน 8:00, กินข้าว 12:00 เรียงตามเวลา —Accuracy · last 5 attempts
• Hard School starts at 08:00. Which arrival time is before lessons? e.g. เด็กบอกว่าไปโรงเรียนตอน 2:00 กลางคืน สมเหตุสมผลหรือไม่ —Accuracy · last 5 attempts

5. Elapsed time and start/end times Member only

Practice Elapsed time and start/end times

• Easy How many hours elapse from 05:00 to 07:00? e.g. จาก 8:00 ถึง 10:00 เป็นเวลากี่ชั่วโมง —Accuracy · last 5 attempts
• Normal How many minutes elapse from 07:50 to 08:00 on the same day? e.g. จาก 8:30 ถึง 9:00 เป็นเวลากี่นาที —Accuracy · last 5 attempts
• Hard 09:50 → next whole hour → 10:30: how many minutes in each segment (first, second)? e.g. 8:45 ถึง 9:20 แยกเป็น 8:45→9:00 และ 9:00→9:20 —Accuracy · last 5 attempts

6. Weekdays and calendars Member only

Practice Weekdays and calendars

• Easy How many days are in one week? e.g. 1 สัปดาห์มีกี่วัน —Accuracy · last 5 attempts
• Normal Today is Tuesday. What weekday is 5 days later? e.g. วันนี้วันจันทร์ อีก 3 วันเป็นวันอะไร —Accuracy · last 5 attempts
• Hard Today is date 10. Is date 10 also the date one day later? e.g. วันนี้วันที่ 5 อีก 1 วัน เด็กตอบวันที่ 5 ผิดอย่างไร —Accuracy · last 5 attempts

7. Comparing and calculating time Member only

Practice Comparing and calculating time

• Easy On the same day, 09:35 __ 09:50. Choose < (before), > (after), or =. e.g. 8:30 __ 9:00 —Accuracy · last 5 attempts
• Normal 33 minutes __ 60 minutes. Choose the sign. e.g. 1 ชั่วโมง __ 50 นาที —Accuracy · last 5 attempts
• Hard Express 93 minutes as hours and remaining minutes (hours, minutes). e.g. เด็กตอบ 40 นาที + 30 นาที = 0 ชั่วโมง 70 นาที โดยไม่จัดหน่วยใหม่ ต้องแก้อย่างไร —Accuracy · last 5 attempts

8. Time situations Member only

Practice Time situations

• Easy Start at 07:00, lasting 180 minutes. When does it finish on the same day? e.g. เริ่มเรียน 8:00 ใช้เวลา 2 ชั่วโมง เลิกกี่โมง —Accuracy · last 5 attempts
• Normal From 09:00 to 10:30, how many hours and minutes (hours, minutes)? e.g. ดูหนังเริ่ม 9:00 จบ 10:30 ใช้เวลากี่ชั่วโมงกี่นาที —Accuracy · last 5 attempts
• Hard From 05:40 to 06:20, choose the sum of minute segments through the next whole hour. e.g. แสดง 8:45 ถึง 9:20 บนเส้นเวลา —Accuracy · last 5 attempts

1. Volume and capacity concepts Member only

Practice Volume and capacity concepts

• Easy Which identical container holds more liquid? e.g. จากภาพ แก้วใดมีน้ำมากกว่า —Accuracy · last 5 attempts
• Normal Two differently shaped containers have no scales. Knowing only that A is taller than B, can we conclude A contains more liquid? e.g. ภาชนะสูงกว่าเสมอไปแปลว่าจุมากกว่าหรือไม่ —Accuracy · last 5 attempts
• Hard Two differently shaped containers have no scales. Knowing only that A is taller than B, can we conclude A contains more liquid? e.g. เด็กเลือกแก้วทรงสูงว่า “มีน้ำมากกว่า” เพียงเพราะระดับน้ำสูงกว่า ผิดตรงไหน —Accuracy · last 5 attempts

2. Nonstandard volume units Member only

Practice Nonstandard volume units

• Easy The liquid fills 4 identical cups. What is its volume in cups? e.g. น้ำในเหยือกเทได้เต็มถ้วย 6 ถ้วย ปริมาตรเท่ากับกี่ถ้วย —Accuracy · last 5 attempts
• Normal Using identical cups, A holds 5 cups and B holds 2. How many cups is the difference? e.g. A จุ 8 ถ้วย B จุ 5 ถ้วย ต่างกันกี่ถ้วย —Accuracy · last 5 attempts
• Hard A uses 8 small cups and B uses 3 large cups. Can their capacities be compared using cup counts alone? e.g. A วัดด้วยแก้วเล็ก 8 แก้ว B วัดด้วยแก้วใหญ่ 7 แก้ว เด็กบอก A จุมากกว่าเพราะ 8>7 ผิดอย่างไร —Accuracy · last 5 attempts

3. Measuring in liters Member only

Practice Measuring in liters

• Easy Which unit describes water volume? e.g. ลิตรเป็นหน่วยสำหรับวัดอะไร —Accuracy · last 5 attempts
• Normal Which container holds 8 liters? e.g. ภาพใดแสดงน้ำ 3 ลิตร —Accuracy · last 5 attempts
• Hard Which unit describes water volume? e.g. เด็กบอกว่าถังน้ำมีความจุ 8 กิโลกรัม ผิดตรงไหน —Accuracy · last 5 attempts

4. Volume units and tools Member only

Practice Volume units and tools

• Easy Which tool directly measures water volume in liters? e.g. ต้องการตวงน้ำควรใช้ภาชนะชนิดใด —Accuracy · last 5 attempts
• Normal This container is filled by 6 one-liter bottles. About how many liters is its capacity? e.g. ขวดน้ำควรจุน้อยกว่าหรือมากกว่าถังน้ำ —Accuracy · last 5 attempts
• Hard Which tool directly measures water volume in liters? e.g. เด็กใช้เครื่องชั่งเพื่อหาว่าน้ำมีกี่ลิตรโดยตรง ผิดที่การเลือกเครื่องมือหรือไม่ —Accuracy · last 5 attempts

5. Comparing volume and capacity Member only

Practice Comparing volume and capacity

• Easy 4 liters __ 2 liters. Choose the sign. e.g. 7 ล. __ 5 ล. —Accuracy · last 5 attempts
• Normal For volumes 13, 6, 5 L, order least to greatest. e.g. เรียง 8, 4, 6 ลิตร —Accuracy · last 5 attempts
• Hard A holds more than B, and B more than C. Which has the greatest capacity? e.g. A จุมากกว่า B และ B จุมากกว่า C ภาชนะใดจุมากที่สุด —Accuracy · last 5 attempts

6. Volume calculations Member only

Practice Volume calculations

• Easy There are 7 L; add 4 L. How many liters result? e.g. 4 ล. + 3 ล. = ? —Accuracy · last 5 attempts
• Normal A contains 9 L and B 4 L. How many more liters does A contain? e.g. A มี 12 ลิตร B มี 7 ลิตร ต่างกันเท่าไร —Accuracy · last 5 attempts
• Hard There are 9 L and 8 L are used. Choose the remaining-volume model. e.g. มีน้ำ 10 ลิตร ใช้ไป 4 ลิตร เด็กทำ 10+4 ผิดอย่างไร —Accuracy · last 5 attempts

7. Volume and capacity situations Member only

Practice Volume and capacity situations

• Easy There are 7 L; add 5 L. Choose the model. e.g. มีน้ำ 5 ลิตร เติมอีก 3 ลิตร มีทั้งหมดเท่าไร —Accuracy · last 5 attempts
• Normal A contains 5 L and B 3 L. How many more liters does A contain? e.g. A มี 12 ลิตร B มี 8 ลิตร A มากกว่าเท่าไร —Accuracy · last 5 attempts
• Hard A 16 L tank contains 8 L. Can 10 L be added without overflowing? e.g. ถังจุ 10 ลิตร มีน้ำ 8 ลิตร จะเติมอีก 5 ลิตรโดยไม่ล้นได้หรือไม่ —Accuracy · last 5 attempts

1. Identify and classify 2D shapes Member only

Practice Identify and classify 2D shapes

• Easy Identify and describe from pictures e.g. รูปใดเป็นสามเหลี่ยม —Accuracy · last 5 attempts
• Normal Use properties and relate representations e.g. เลือกรูปสี่เหลี่ยมทั้งหมดจากภาพ —Accuracy · last 5 attempts
• Hard Analyze errors and reason about properties e.g. รูปสี่เหลี่ยมที่เอียงยังเป็นสี่เหลี่ยม เพราะอะไร —Accuracy · last 5 attempts

2. Sides and vertices Member only

Practice Sides and vertices

• Easy Identify and describe from pictures e.g. รูปสามเหลี่ยมมีจุดยอดกี่จุด —Accuracy · last 5 attempts
• Normal Use properties and relate representations e.g. รูปใดมี 4 ด้านและ 4 จุดยอด —Accuracy · last 5 attempts
• Hard Analyze errors and reason about properties e.g. เด็กนับจุดเริ่มซ้ำจึงได้ 5 ด้านจากสี่เหลี่ยม ผิดอย่างไร —Accuracy · last 5 attempts

3. Triangles and quadrilaterals Member only

Practice Triangles and quadrilaterals

• Easy Identify and describe from pictures e.g. รูปใดมี 3 ด้านและ 3 จุดยอด —Accuracy · last 5 attempts
• Normal Use properties and relate representations e.g. รูปเว้าที่มี 4 ด้านตรงยังเป็นสี่เหลี่ยมหรือไม่ —Accuracy · last 5 attempts
• Hard Analyze errors and reason about properties e.g. สามเหลี่ยมที่หันลงยังเป็นสามเหลี่ยม เพราะอะไร —Accuracy · last 5 attempts

4. Circles, ovals and curved boundaries Member only

Practice Circles, ovals and curved boundaries

• Easy Identify and describe from pictures e.g. รูปใดเป็นวงรี —Accuracy · last 5 attempts
• Normal Use properties and relate representations e.g. วงกลมกับสามเหลี่ยมต่างกันที่ขอบอย่างไร —Accuracy · last 5 attempts
• Hard Analyze errors and reason about properties e.g. ขอบโค้งของวงกลมเป็นด้านตรงหรือไม่ เพราะอะไร —Accuracy · last 5 attempts

5. Compose and decompose shapes Member only

Practice Compose and decompose shapes

• Easy Identify and describe from pictures e.g. ภาพสี่เหลี่ยมถูกแบ่งเป็นสามเหลี่ยมกี่รูป —Accuracy · last 5 attempts
• Normal Use properties and relate representations e.g. ชิ้นส่วนคู่ใดประกอบเป็นรูปเป้าหมายได้ —Accuracy · last 5 attempts
• Hard Analyze errors and reason about properties e.g. ต้องหมุนชิ้นส่วนอย่างไรจึงตรงกับช่องว่าง —Accuracy · last 5 attempts

6. Geometric patterns Member only

Practice Geometric patterns

• Easy Identify and describe from pictures e.g. ○ △ ○ △ ○ __ —Accuracy · last 5 attempts
• Normal Use properties and relate representations e.g. หน่วยซ้ำที่สั้นที่สุดของ ○ △ □ ○ △ □ คืออะไร —Accuracy · last 5 attempts
• Hard Analyze errors and reason about properties e.g. ↑ → ↓ ← ↑ → __ —Accuracy · last 5 attempts

7. Reason about shape properties Member only

Practice Reason about shape properties

• Easy Identify and describe from pictures e.g. ฉันมี 3 ด้านตรงและ 3 จุดยอด ฉันคือรูปอะไร —Accuracy · last 5 attempts
• Normal Use properties and relate representations e.g. หมุนรูปแล้วสมบัติใดไม่เปลี่ยน —Accuracy · last 5 attempts
• Hard Analyze errors and reason about properties e.g. มีเพียงขอบโค้ง ระบุแน่นอนได้หรือไม่ว่าเป็นวงกลม —Accuracy · last 5 attempts

1. Select arithmetic operations Member only

Practice Select arithmetic operations

• Easy Understand situations and calculate basic steps e.g. มี 5 กล่อง กล่องละ 6 ชิ้น ควรใช้การใด —Accuracy · last 5 attempts
• Normal Connect steps, intermediate quantities and models e.g. สถานการณ์ใดตรงกับ 6×5 —Accuracy · last 5 attempts
• Hard Reverse, check and analyze errors e.g. มีน้อยกว่าอีกคน 5 ลูก จะหาจำนวนของอีกคนอย่างไร —Accuracy · last 5 attempts

2. Two-step addition and subtraction Member only

Practice Two-step addition and subtraction

• Easy Understand situations and calculate basic steps e.g. 25+13 แล้วนำผลไปบวก 20 —Accuracy · last 5 attempts
• Normal Connect steps, intermediate quantities and models e.g. 30+25 ได้ 55 แล้วนำ 55 ไปลบเท่าไรจึงได้ 40 —Accuracy · last 5 attempts
• Hard Reverse, check and analyze errors e.g. เลือกสมการถูก แต่คำนวณขั้นแรกผิด ปัญหาอยู่ส่วนใด —Accuracy · last 5 attempts

3. Two steps involving multiplication Member only

Practice Two steps involving multiplication

• Easy Understand situations and calculate basic steps e.g. มี 4 กล่อง กล่องละ 6 และมีอีก 5 เลือกแบบจำลอง —Accuracy · last 5 attempts
• Normal Connect steps, intermediate quantities and models e.g. กล่องละ 3 ลูกกับอีก 2 ลูก มี 4 กล่อง ต้องทำอะไรก่อน —Accuracy · last 5 attempts
• Hard Reverse, check and analyze errors e.g. 4 กล่อง กล่องละ 7 กับอีก 3 ใช้ 4+7+3 ผิดอย่างไร —Accuracy · last 5 attempts

4. Two steps involving division Member only

Practice Two steps involving division

• Easy Understand situations and calculate basic steps e.g. 24 ชิ้นแบ่ง 6 คน แล้วแต่ละคนได้เพิ่ม 2 เลือกแบบจำลอง —Accuracy · last 5 attempts
• Normal Connect steps, intermediate quantities and models e.g. ซื้อเพิ่มก่อนแล้วแบ่งเท่ากัน ต้องหาอะไรก่อน —Accuracy · last 5 attempts
• Hard Reverse, check and analyze errors e.g. 24 ชิ้นจัดถุงละ 6 ได้ 4 ถุง ไม่ใช่ถุงละ 4 —Accuracy · last 5 attempts

5. Multiplication and division together Member only

Practice Multiplication and division together

• Easy Understand situations and calculate basic steps e.g. 6×4=24 แล้ว 24÷6 ได้เท่าไร —Accuracy · last 5 attempts
• Normal Connect steps, intermediate quantities and models e.g. 4 กล่อง กล่องละ 6 แบ่งให้ 8 คน ต้องทำอะไรก่อน —Accuracy · last 5 attempts
• Hard Reverse, check and analyze errors e.g. หลังหาจำนวนทั้งหมดแล้ว ใช้ลบแทนแบ่งเท่ากัน ผิดอย่างไร —Accuracy · last 5 attempts

6. Unknown quantities and checking Member only

Practice Unknown quantities and checking

• Easy Understand situations and calculate basic steps e.g. มี 35 ได้เพิ่มเท่าไรจึงเป็น 60 —Accuracy · last 5 attempts
• Normal Connect steps, intermediate quantities and models e.g. 40÷จำนวนใด=5 —Accuracy · last 5 attempts
• Hard Reverse, check and analyze errors e.g. มี 20 เพิ่มบางส่วนแล้วแบ่ง 5 คน คนละ 6 ต้องเพิ่มเท่าไร —Accuracy · last 5 attempts

7. Mixed-operation word problems Member only

Practice Mixed-operation word problems

• Easy Understand situations and calculate basic steps e.g. มีหนังสือ 35 ซื้อเพิ่ม 20 แจก 18 เลือกแบบจำลอง —Accuracy · last 5 attempts
• Normal Connect steps, intermediate quantities and models e.g. มี 20 ซื้อเพิ่ม 10 แล้วแบ่ง 5 คน เลือกลำดับ —Accuracy · last 5 attempts
• Hard Reverse, check and analyze errors e.g. สมการตรงโจทย์ แต่คำนวณผลคูณผิด ควรฝึกเรื่องใด —Accuracy · last 5 attempts

1. Pictograph components and reading Member only

Practice Pictograph components and reading

• Easy Read data and understand the key e.g. อ่านและเข้าใจค่าต่อรูป —Accuracy · last 5 attempts
• Normal Convert quantities, compare and complete charts e.g. แปลงค่า เปรียบเทียบ และเติมข้อมูล —Accuracy · last 5 attempts
• Hard Reason about missing data and errors e.g. วิเคราะห์ข้อมูลและตรวจข้อผิดพลาด —Accuracy · last 5 attempts

2. One symbol represents 2 units Member only

Practice One symbol represents 2 units

• Easy Read data and understand the key e.g. อ่านและเข้าใจค่าต่อรูป —Accuracy · last 5 attempts
• Normal Convert quantities, compare and complete charts e.g. แปลงค่า เปรียบเทียบ และเติมข้อมูล —Accuracy · last 5 attempts
• Hard Reason about missing data and errors e.g. วิเคราะห์ข้อมูลและตรวจข้อผิดพลาด —Accuracy · last 5 attempts

3. One symbol represents 5 units Member only

Practice One symbol represents 5 units

• Easy Read data and understand the key e.g. อ่านและเข้าใจค่าต่อรูป —Accuracy · last 5 attempts
• Normal Convert quantities, compare and complete charts e.g. แปลงค่า เปรียบเทียบ และเติมข้อมูล —Accuracy · last 5 attempts
• Hard Reason about missing data and errors e.g. วิเคราะห์ข้อมูลและตรวจข้อผิดพลาด —Accuracy · last 5 attempts

4. One symbol represents 10 units Member only

Practice One symbol represents 10 units

• Easy Read data and understand the key e.g. อ่านและเข้าใจค่าต่อรูป —Accuracy · last 5 attempts
• Normal Convert quantities, compare and complete charts e.g. แปลงค่า เปรียบเทียบ และเติมข้อมูล —Accuracy · last 5 attempts
• Hard Reason about missing data and errors e.g. วิเคราะห์ข้อมูลและตรวจข้อผิดพลาด —Accuracy · last 5 attempts

5. Comparing and analyzing pictograph data Member only

Practice Comparing and analyzing pictograph data

• Easy Read data and understand the key e.g. อ่านและเข้าใจค่าต่อรูป —Accuracy · last 5 attempts
• Normal Convert quantities, compare and complete charts e.g. แปลงค่า เปรียบเทียบ และเติมข้อมูล —Accuracy · last 5 attempts
• Hard Reason about missing data and errors e.g. วิเคราะห์ข้อมูลและตรวจข้อผิดพลาด —Accuracy · last 5 attempts

6. Constructing and completing pictographs Member only

Practice Constructing and completing pictographs

• Easy Read data and understand the key e.g. อ่านและเข้าใจค่าต่อรูป —Accuracy · last 5 attempts
• Normal Convert quantities, compare and complete charts e.g. แปลงค่า เปรียบเทียบ และเติมข้อมูล —Accuracy · last 5 attempts
• Hard Reason about missing data and errors e.g. วิเคราะห์ข้อมูลและตรวจข้อผิดพลาด —Accuracy · last 5 attempts

7. Solving situations with pictographs Member only

Practice Solving situations with pictographs

• Easy Read data and understand the key e.g. อ่านและเข้าใจค่าต่อรูป —Accuracy · last 5 attempts
• Normal Convert quantities, compare and complete charts e.g. แปลงค่า เปรียบเทียบ และเติมข้อมูล —Accuracy · last 5 attempts
• Hard Reason about missing data and errors e.g. วิเคราะห์ข้อมูลและตรวจข้อผิดพลาด —Accuracy · last 5 attempts