South Korea · Grade 3 · Practice Sheet 12

1. 1.

   What is double 24?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   Add 5 + 5 + 2.

   Formula:Addition of Three Numbers

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

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3. 3.

   Add 49 and 22.

   Formula:Addition

   $\text{sum} = a + b$

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4. 4.

   What is double 23?

   Formula:Doubling

   $d = 2 \times n$

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5. 5.

   How many tens are there in the number 18?

   Formula:Place Value

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

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6. 6.

   Add 18 + 9 + 14.

   Formula:Addition of Three Numbers

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

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7. 7.

   There are 2 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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8. 8.

   24 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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9. 9.

   There are 6 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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10. 10.

    40 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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11. 11.

    You have ₩1 and ₩8. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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12. 12.

    How many tens are there in the number 42?

    Formula:Place Value

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

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13. 13.

    Continue the pattern by counting in 5s: 20, 25, ___

    Formula:Skip Counting

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

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14. 14.

    What is double 8?

    Formula:Doubling

    $d = 2 \times n$

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15. 15.

    What is half of 38?

    Formula:Halving

    $h = n \div 2$

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16. 16.

    32 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.

    What is 10 × 5?

    Formula:Multiplication (Times Tables)

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

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18. 18.

    Subtract 5 from 65.

    Formula:Subtraction

    $\text{difference} = a - b$

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19. 19.

    What is half of 18?

    Formula:Halving

    $h = n \div 2$

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20. 20.

    Add 9 + 12 + 4.

    Formula:Addition of Three Numbers

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

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