Hong Kong · Grade 3 · Practice Sheet 17

1. 1.

   Add 13 + 19 + 11.

   Formula:Addition of Three Numbers

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

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2. 2.

   What is half of 18?

   Formula:Halving

   $h = n \div 2$

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3. 3.

   Subtract 71 from 97.

   Formula:Subtraction

   $\text{difference} = a - b$

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4. 4.

   There are 2 bags with 2 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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5. 5.

   You have HK$ 2 and HK$ 7. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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6. 6.

   Fill in the missing number: 6 + ___ = 8.

   Formula:Missing Addend

   $b = \text{total} - a$

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7. 7.

   How many tens are there in the number 36?

   Formula:Place Value

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

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8. 8.

   Fill in the missing number: 10 + ___ = 24.

   Formula:Missing Addend

   $b = \text{total} - a$

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9. 9.

   Add 23 and 12.

   Formula:Addition

   $\text{sum} = a + b$

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10. 10.

    Subtract 22 from 31.

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    You have HK$ 1 and HK$ 6. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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12. 12.

    What is half of 36?

    Formula:Halving

    $h = n \div 2$

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13. 13.

    You have HK$ 4 and HK$ 2. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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14. 14.

    What is 5 × 9?

    Formula:Multiplication (Times Tables)

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

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15. 15.

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

    Formula:Skip Counting

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

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16. 16.

    What is 2 × 10?

    Formula:Multiplication (Times Tables)

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

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17. 17.

    Subtract 59 from 99.

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    Fill in the missing number: 11 + ___ = 22.

    Formula:Missing Addend

    $b = \text{total} - a$

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19. 19.

    Add 79 and 47.

    Formula:Addition

    $\text{sum} = a + b$

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20. 20.

    Fill in the missing number: 5 + ___ = 16.

    Formula:Missing Addend

    $b = \text{total} - a$

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