South Korea · Grade 3 · Practice Sheet 25

1. 1.

   What is double 24?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   Add 58 and 22.

   Formula:Addition

   $\text{sum} = a + b$

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3. 3.

   How many tens are there in the number 89?

   Formula:Place Value

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

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4. 4.

   Add 26 and 7.

   Formula:Addition

   $\text{sum} = a + b$

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5. 5.

   What is double 11?

   Formula:Doubling

   $d = 2 \times n$

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6. 6.

   There are 4 bags with 5 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.

   Add 40 and 6.

   Formula:Addition

   $\text{sum} = a + b$

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8. 8.

   How many tens are there in the number 63?

   Formula:Place Value

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

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9. 9.

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

   Formula:Skip Counting

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

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10. 10.

    Subtract 20 from 56.

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    Add 75 and 48.

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    Subtract 7 from 58.

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    Fill in the missing number: 14 + ___ = 24.

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

    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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15. 15.

    What is 6 × 3?

    Formula:Multiplication (Times Tables)

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

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16. 16.

    What is double 24?

    Formula:Doubling

    $d = 2 \times n$

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17. 17.

    Subtract 57 from 99.

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    What is 10 × 5?

    Formula:Multiplication (Times Tables)

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

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19. 19.

    Fill in the missing number: 2 + ___ = 7.

    Formula:Missing Addend

    $b = \text{total} - a$

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20. 20.

    Subtract 24 from 61.

    Formula:Subtraction

    $\text{difference} = a - b$

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