South Korea · Grade 3 · Practice Sheet 41

1. 1.

   What is 3 × 6?

   Formula:Multiplication (Times Tables)

   $\text{product} = a \times b$

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2. 2.

   What is double 20?

   Formula:Doubling

   $d = 2 \times n$

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3. 3.

   What is half of 10?

   Formula:Halving

   $h = n \div 2$

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4. 4.

   Add 21 and 21.

   Formula:Addition

   $\text{sum} = a + b$

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5. 5.

   Subtract 33 from 46.

   Formula:Subtraction

   $\text{difference} = a - b$

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6. 6.

   What is 2 × 10?

   Formula:Multiplication (Times Tables)

   $\text{product} = a \times b$

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7. 7.

   Add 24 and 7.

   Formula:Addition

   $\text{sum} = a + b$

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8. 8.

   Subtract 9 from 45.

   Formula:Subtraction

   $\text{difference} = a - b$

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9. 9.

   Fill in the missing number: 2 + ___ = 5.

   Formula:Missing Addend

   $b = \text{total} - a$

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10. 10.

    You have ₩2 and ₩2. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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11. 11.

    25 sweets are shared equally among 5 children. How many does each child get?

    Formula:Division (Equal Sharing)

    $\text{each} = \text{total} \div \text{groups}$

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12. 12.

    Fill in the missing number: 9 + ___ = 18.

    Formula:Missing Addend

    $b = \text{total} - a$

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13. 13.

    What is 6 × 5?

    Formula:Multiplication (Times Tables)

    $\text{product} = a \times b$

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14. 14.

    What is double 13?

    Formula:Doubling

    $d = 2 \times n$

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15. 15.

    Fill in the missing number: 14 + ___ = 17.

    Formula:Missing Addend

    $b = \text{total} - a$

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16. 16.

    How many tens are there in the number 43?

    Formula:Place Value

    $\text{value} = \text{tens} \times 10 + \text{ones}$

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17. 17.

    Add 17 + 14 + 7.

    Formula:Addition of Three Numbers

    $\text{sum} = a + b + c$

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18. 18.

    You have ₩4 and ₩3. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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19. 19.

    How many tens are there in the number 17?

    Formula:Place Value

    $\text{value} = \text{tens} \times 10 + \text{ones}$

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20. 20.

    21 sweets are shared equally among 3 children. How many does each child get?

    Formula:Division (Equal Sharing)

    $\text{each} = \text{total} \div \text{groups}$

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