Hong Kong · Grade 1 · Practice Sheet 50

1. 1.

   What is double 25?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   What is 16 − 7?

   Formula:Subtraction

   $\text{difference} = a - b$

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3. 3.

   What is double 9?

   Formula:Doubling

   $d = 2 \times n$

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4. 4.

   What is 13 − 3?

   Formula:Subtraction

   $\text{difference} = a - b$

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5. 5.

   You have HK$ 8 and HK$ 6. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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6. 6.

   Continue the pattern by counting in 3s: 0, 3, ___

   Formula:Skip Counting

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

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7. 7.

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

   Formula:Adding Money

   $\text{total} = a + b$

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8. 8.

   What is 14 − 12?

   Formula:Subtraction

   $\text{difference} = a - b$

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9. 9.

   What is 6 + 7?

   Formula:Addition

   $\text{sum} = a + b$

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10. 10.

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

    Formula:Skip Counting

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

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11. 11.

    What is 3 + 5?

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    What is 7 − 1?

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    Fill in the missing number: 15 + ___ = 27.

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

    Add 57 and 41.

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    What is 7 − 6?

    Formula:Subtraction

    $\text{difference} = a - b$

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16. 16.

    What is double 24?

    Formula:Doubling

    $d = 2 \times n$

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17. 17.

    What is 17 − 13?

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    What is 9 + 7?

    Formula:Addition

    $\text{sum} = a + b$

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19. 19.

    Fill in the missing number: 3 + ___ = 14.

    Formula:Missing Addend

    $b = \text{total} - a$

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20. 20.

    Add 70 and 37.

    Formula:Addition

    $\text{sum} = a + b$

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