Brazil · Ano 3 · Practice Sheet 15

1. 1.

   How many tens are there in the number 21?

   Formula:Place Value

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

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2. 2.

   Add 5 + 19 + 12.

   Formula:Addition of Three Numbers

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

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3. 3.

   Continue the pattern by counting in 2s: 2, 4, ___

   Formula:Skip Counting

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

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4. 4.

   Add 17 + 14 + 8.

   Formula:Addition of Three Numbers

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

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5. 5.

   Add 16 and 51.

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   Fill in the missing number: 3 + ___ = 15.

   Formula:Missing Addend

   $b = \text{total} - a$

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7. 7.

   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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8. 8.

   Add 31 and 22.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   What is half of 26?

   Formula:Halving

   $h = n \div 2$

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10. 10.

    You have R$ 8 and R$ 7. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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11. 11.

    Add 28 and 48.

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    Subtract 10 from 33.

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    Fill in the missing number: 2 + ___ = 8.

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

    What is half of 32?

    Formula:Halving

    $h = n \div 2$

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15. 15.

    12 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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16. 16.

    Subtract 34 from 57.

    Formula:Subtraction

    $\text{difference} = a - b$

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17. 17.

    There are 3 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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18. 18.

    Add 75 and 14.

    Formula:Addition

    $\text{sum} = a + b$

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19. 19.

    Continue the pattern by counting in 5s: 10, 15, ___

    Formula:Skip Counting

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

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20. 20.

    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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