Romania · Grade 3 · Practice Sheet 28

1. 1.

   Fill in the missing number: 8 + ___ = 23.

   Formula:Missing Addend

   $b = \text{total} - a$

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2. 2.

   Add 10 + 8 + 14.

   Formula:Addition of Three Numbers

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

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3. 3.

   Subtract 20 from 31.

   Formula:Subtraction

   $\text{difference} = a - b$

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4. 4.

   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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5. 5.

   Add 9 + 15 + 7.

   Formula:Addition of Three Numbers

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

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6. 6.

   Subtract 24 from 43.

   Formula:Subtraction

   $\text{difference} = a - b$

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7. 7.

   What is double 12?

   Formula:Doubling

   $d = 2 \times n$

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8. 8.

   Add 50 and 49.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Continue the pattern by counting in 5s: 0, 5, ___

   Formula:Skip Counting

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

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10. 10.

    There are 4 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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11. 11.

    What is double 6?

    Formula:Doubling

    $d = 2 \times n$

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12. 12.

    Add 11 + 17 + 8.

    Formula:Addition of Three Numbers

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

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13. 13.

    Continue the pattern by counting in 10s: 20, 30, ___

    Formula:Skip Counting

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

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14. 14.

    Add 77 and 36.

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    What is double 11?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    Add 44 and 44.

    Formula:Addition

    $\text{sum} = a + b$

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17. 17.

    What is half of 38?

    Formula:Halving

    $h = n \div 2$

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18. 18.

    There are 5 bags with 4 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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19. 19.

    What is half of 50?

    Formula:Halving

    $h = n \div 2$

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20. 20.

    Add 2 + 4 + 15.

    Formula:Addition of Three Numbers

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

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