South Korea · Grade 3 · Practice Sheet 1

1. 1.

   Subtract 22 from 59.

   Formula:Subtraction

   $\text{difference} = a - b$

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2. 2.

   Add 31 and 48.

   Formula:Addition

   $\text{sum} = a + b$

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3. 3.

   Continue the pattern by counting in 2s: 8, 10, ___

   Formula:Skip Counting

   $\text{next} = \text{term} + \text{step}$

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4. 4.

   What is 3 × 8?

   Formula:Multiplication (Times Tables)

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

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5. 5.

   What is double 5?

   Formula:Doubling

   $d = 2 \times n$

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6. 6.

   There are 3 bags with 3 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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7. 7.

   What is half of 22?

   Formula:Halving

   $h = n \div 2$

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8. 8.

   Add 6 + 17 + 9.

   Formula:Addition of Three Numbers

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

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9. 9.

   How many tens are there in the number 35?

   Formula:Place Value

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

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10. 10.

    Add 83 and 59.

    Formula:Addition

    $\text{sum} = a + b$

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11. 11.

    Subtract 15 from 65.

    Formula:Subtraction

    $\text{difference} = a - b$

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12. 12.

    Add 22 and 48.

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

    What is half of 36?

    Formula:Halving

    $h = n \div 2$

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14. 14.

    What is double 4?

    Formula:Doubling

    $d = 2 \times n$

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15. 15.

    Subtract 26 from 35.

    Formula:Subtraction

    $\text{difference} = a - b$

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16. 16.

    36 sweets are shared equally among 4 children. How many does each child get?

    Formula:Division (Equal Sharing)

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

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17. 17.

    Continue the pattern by counting in 3s: 6, 9, ___

    Formula:Skip Counting

    $\text{next} = \text{term} + \text{step}$

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18. 18.

    18 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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19. 19.

    What is half of 14?

    Formula:Halving

    $h = n \div 2$

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20. 20.

    You have ₩6 and ₩3. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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