Taiwan · Grade 3 · Practice Sheet 42

1. 1.

   Subtract 19 from 88.

   Formula:Subtraction

   $\text{difference} = a - b$

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2. 2.

   Add 21 and 38.

   Formula:Addition

   $\text{sum} = a + b$

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3. 3.

   Subtract 40 from 57.

   Formula:Subtraction

   $\text{difference} = a - b$

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4. 4.

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

   Formula:Missing Addend

   $b = \text{total} - a$

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5. 5.

   Add 5 + 17 + 10.

   Formula:Addition of Three Numbers

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

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6. 6.

   What is half of 22?

   Formula:Halving

   $h = n \div 2$

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7. 7.

   Add 17 + 10 + 10.

   Formula:Addition of Three Numbers

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

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8. 8.

   Fill in the missing number: 2 + ___ = 17.

   Formula:Missing Addend

   $b = \text{total} - a$

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9. 9.

   What is double 18?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    Continue the pattern by counting in 2s: 8, 10, ___

    Formula:Skip Counting

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

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11. 11.

    Add 72 and 7.

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    What is double 19?

    Formula:Doubling

    $d = 2 \times n$

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13. 13.

    Add 7 + 19 + 20.

    Formula:Addition of Three Numbers

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

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14. 14.

    What is double 11?

    Formula:Doubling

    $d = 2 \times n$

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15. 15.

    What is half of 38?

    Formula:Halving

    $h = n \div 2$

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16. 16.

    You have NT$ 3 and NT$ 4. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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17. 17.

    What is 4 × 3?

    Formula:Multiplication (Times Tables)

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

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18. 18.

    How many tens are there in the number 80?

    Formula:Place Value

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

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19. 19.

    45 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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20. 20.

    Add 18 + 19 + 3.

    Formula:Addition of Three Numbers

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

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