Chile · Grado 3 · Practice Sheet 24

1. 1.

   What is half of 20?

   Formula:Halving

   $h = n \div 2$

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2. 2.

   Subtract 40 from 63.

   Formula:Subtraction

   $\text{difference} = a - b$

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3. 3.

   35 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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4. 4.

   How many tens are there in the number 46?

   Formula:Place Value

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

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5. 5.

   Add 11 + 20 + 3.

   Formula:Addition of Three Numbers

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

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6. 6.

   Add 86 and 7.

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   What is half of 30?

   Formula:Halving

   $h = n \div 2$

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8. 8.

   Add 18 + 16 + 8.

   Formula:Addition of Three Numbers

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

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9. 9.

   What is double 12?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    What is half of 28?

    Formula:Halving

    $h = n \div 2$

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11. 11.

    Add 9 + 3 + 9.

    Formula:Addition of Three Numbers

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

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12. 12.

    Continue the pattern by counting in 10s: 40, 50, ___

    Formula:Skip Counting

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

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13. 13.

    Add 79 and 47.

    Formula:Addition

    $\text{sum} = a + b$

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14. 14.

    What is double 20?

    Formula:Doubling

    $d = 2 \times n$

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15. 15.

    Fill in the missing number: 7 + ___ = 16.

    Formula:Missing Addend

    $b = \text{total} - a$

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16. 16.

    Add 13 + 14 + 10.

    Formula:Addition of Three Numbers

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

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17. 17.

    There are 6 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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18. 18.

    14 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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19. 19.

    How many tens are there in the number 68?

    Formula:Place Value

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

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20. 20.

    Fill in the missing number: 8 + ___ = 12.

    Formula:Missing Addend

    $b = \text{total} - a$

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