Hong Kong · Grade 2 · Practice Sheet 21

1. 1.

   What is 1 + 2?

   Formula:Addition

   $\text{sum} = a + b$

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2. 2.

   Subtract 75 from 89.

   Formula:Subtraction

   $\text{difference} = a - b$

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3. 3.

   What is half of 20?

   Formula:Halving

   $h = n \div 2$

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4. 4.

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

   Formula:Missing Addend

   $b = \text{total} - a$

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5. 5.

   Add 12 + 13 + 16.

   Formula:Addition of Three Numbers

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

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6. 6.

   Continue the pattern by counting in 5s: 15, 20, ___

   Formula:Skip Counting

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

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7. 7.

   How many tens are there in the number 86?

   Formula:Place Value

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

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8. 8.

   What is double 10?

   Formula:Doubling

   $d = 2 \times n$

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9. 9.

   Add 77 and 29.

   Formula:Addition

   $\text{sum} = a + b$

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10. 10.

    What is 8 − 6?

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    What is half of 42?

    Formula:Halving

    $h = n \div 2$

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12. 12.

    What is 4 × 8?

    Formula:Multiplication (Times Tables)

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

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13. 13.

    Subtract 23 from 38.

    Formula:Subtraction

    $\text{difference} = a - b$

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14. 14.

    How many tens are there in the number 22?

    Formula:Place Value

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

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15. 15.

    What is 4 × 8?

    Formula:Multiplication (Times Tables)

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

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16. 16.

    You have HK$ 3 and HK$ 9. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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17. 17.

    Subtract 28 from 44.

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    Fill in the missing number: 7 + ___ = 12.

    Formula:Missing Addend

    $b = \text{total} - a$

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19. 19.

    How many tens are there in the number 27?

    Formula:Place Value

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

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20. 20.

    Add 37 and 42.

    Formula:Addition

    $\text{sum} = a + b$

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