Cambodia · Grade 3 · Practice Sheet 42

1. 1.

   Add 20 + 15 + 2.

   Formula:Addition of Three Numbers

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

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2. 2.

   Fill in the missing number: 3 + ___ = 12.

   Formula:Missing Addend

   $b = \text{total} - a$

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3. 3.

   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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4. 4.

   What is half of 20?

   Formula:Halving

   $h = n \div 2$

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5. 5.

   Fill in the missing number: 2 + ___ = 4.

   Formula:Missing Addend

   $b = \text{total} - a$

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6. 6.

   What is double 19?

   Formula:Doubling

   $d = 2 \times n$

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7. 7.

   Fill in the missing number: 2 + ___ = 14.

   Formula:Missing Addend

   $b = \text{total} - a$

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8. 8.

   Add 25 and 18.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   What is double 22?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    What is 8 × 7?

    Formula:Multiplication (Times Tables)

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

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11. 11.

    There are 3 bags with 8 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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12. 12.

    What is double 4?

    Formula:Doubling

    $d = 2 \times n$

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13. 13.

    How many tens are there in the number 24?

    Formula:Place Value

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

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14. 14.

    4 sweets are shared equally among 2 children. How many does each child get?

    Formula:Division (Equal Sharing)

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

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15. 15.

    You have ៛ 7 and ៛ 4. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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16. 16.

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

    Formula:Missing Addend

    $b = \text{total} - a$

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17. 17.

    How many tens are there in the number 73?

    Formula:Place Value

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

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18. 18.

    What is 10 × 6?

    Formula:Multiplication (Times Tables)

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

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19. 19.

    16 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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20. 20.

    What is 6 × 4?

    Formula:Multiplication (Times Tables)

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

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