Hong Kong · Grade 3 · Practice Sheet 7

1. 1.

   Add 21 and 45.

   Formula:Addition

   $\text{sum} = a + b$

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2. 2.

   What is double 11?

   Formula:Doubling

   $d = 2 \times n$

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3. 3.

   What is 5 × 7?

   Formula:Multiplication (Times Tables)

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

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4. 4.

   Fill in the missing number: 15 + ___ = 23.

   Formula:Missing Addend

   $b = \text{total} - a$

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5. 5.

   Add 76 and 15.

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   Fill in the missing number: 11 + ___ = 13.

   Formula:Missing Addend

   $b = \text{total} - a$

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7. 7.

   What is 10 × 7?

   Formula:Multiplication (Times Tables)

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

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8. 8.

   What is half of 24?

   Formula:Halving

   $h = n \div 2$

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9. 9.

   Fill in the missing number: 13 + ___ = 19.

   Formula:Missing Addend

   $b = \text{total} - a$

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10. 10.

    What is double 2?

    Formula:Doubling

    $d = 2 \times n$

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11. 11.

    What is 2 × 6?

    Formula:Multiplication (Times Tables)

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

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12. 12.

    Subtract 21 from 42.

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    Fill in the missing number: 2 + ___ = 14.

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

    Add 11 + 15 + 4.

    Formula:Addition of Three Numbers

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

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15. 15.

    Fill in the missing number: 4 + ___ = 18.

    Formula:Missing Addend

    $b = \text{total} - a$

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16. 16.

    What is double 4?

    Formula:Doubling

    $d = 2 \times n$

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17. 17.

    How many tens are there in the number 53?

    Formula:Place Value

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

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18. 18.

    Add 3 + 12 + 4.

    Formula:Addition of Three Numbers

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

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19. 19.

    Fill in the missing number: 5 + ___ = 17.

    Formula:Missing Addend

    $b = \text{total} - a$

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20. 20.

    You have HK$ 5 and HK$ 4. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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