Vietnam · Grade 2 · Practice Sheet 21

1. 1.

   What is double 8?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   How many tens are there in the number 90?

   Formula:Place Value

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

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3. 3.

   What is half of 28?

   Formula:Halving

   $h = n \div 2$

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4. 4.

   Add 55 and 39.

   Formula:Addition

   $\text{sum} = a + b$

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5. 5.

   Subtract 39 from 68.

   Formula:Subtraction

   $\text{difference} = a - b$

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6. 6.

   How many tens are there in the number 25?

   Formula:Place Value

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

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7. 7.

   Subtract 90 from 96.

   Formula:Subtraction

   $\text{difference} = a - b$

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8. 8.

   You have VND 5 and VND 9. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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9. 9.

   How many tens are there in the number 86?

   Formula:Place Value

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

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10. 10.

    What is 6 − 4?

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

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

    Formula:Skip Counting

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

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12. 12.

    Fill in the missing number: 13 + ___ = 24.

    Formula:Missing Addend

    $b = \text{total} - a$

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13. 13.

    What is double 10?

    Formula:Doubling

    $d = 2 \times n$

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14. 14.

    What is half of 48?

    Formula:Halving

    $h = n \div 2$

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15. 15.

    Fill in the missing number: 7 + ___ = 10.

    Formula:Missing Addend

    $b = \text{total} - a$

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16. 16.

    What is 5 + 8?

    Formula:Addition

    $\text{sum} = a + b$

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17. 17.

    What is 16 − 14?

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    Subtract 12 from 48.

    Formula:Subtraction

    $\text{difference} = a - b$

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19. 19.

    What is double 9?

    Formula:Doubling

    $d = 2 \times n$

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20. 20.

    What is 15 − 11?

    Formula:Subtraction

    $\text{difference} = a - b$

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