South Korea · Grade 3 · Practice Sheet 28

1. 1.

   Subtract 7 from 38.

   Formula:Subtraction

   $\text{difference} = a - b$

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2. 2.

   Fill in the missing number: 7 + ___ = 13.

   Formula:Missing Addend

   $b = \text{total} - a$

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3. 3.

   What is half of 34?

   Formula:Halving

   $h = n \div 2$

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4. 4.

   Fill in the missing number: 11 + ___ = 24.

   Formula:Missing Addend

   $b = \text{total} - a$

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5. 5.

   35 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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6. 6.

   What is half of 26?

   Formula:Halving

   $h = n \div 2$

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7. 7.

   Fill in the missing number: 15 + ___ = 30.

   Formula:Missing Addend

   $b = \text{total} - a$

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8. 8.

   Add 15 and 36.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Subtract 22 from 31.

   Formula:Subtraction

   $\text{difference} = a - b$

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10. 10.

    You have ₩5 and ₩1. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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11. 11.

    27 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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12. 12.

    You have ₩9 and ₩9. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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13. 13.

    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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14. 14.

    Add 18 and 34.

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    You have ₩3 and ₩5. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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16. 16.

    There are 3 bags with 6 apples in each bag. How many apples are there in total?

    Formula:Multiplication as Repeated Addition

    $\text{total} = \text{groups} \times \text{size}$

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17. 17.

    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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18. 18.

    What is half of 12?

    Formula:Halving

    $h = n \div 2$

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19. 19.

    Add 13 and 55.

    Formula:Addition

    $\text{sum} = a + b$

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20. 20.

    Subtract 26 from 52.

    Formula:Subtraction

    $\text{difference} = a - b$

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