Taiwan · Grade 2 · Practice Sheet 40

1. 1.

   What is double 8?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   Continue the pattern by counting in 2s: 0, 2, ___

   Formula:Skip Counting

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

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3. 3.

   Fill in the missing number: 13 + ___ = 27.

   Formula:Missing Addend

   $b = \text{total} - a$

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4. 4.

   You have NT$ 8 and NT$ 2. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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5. 5.

   What is 3 + 7?

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   Add 8 + 13 + 13.

   Formula:Addition of Three Numbers

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

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7. 7.

   There are 2 bags with 5 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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8. 8.

   How many tens are there in the number 71?

   Formula:Place Value

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

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9. 9.

   Add 18 + 19 + 14.

   Formula:Addition of Three Numbers

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

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10. 10.

    What is half of 16?

    Formula:Halving

    $h = n \div 2$

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11. 11.

    Add 14 + 9 + 15.

    Formula:Addition of Three Numbers

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

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12. 12.

    What is double 15?

    Formula:Doubling

    $d = 2 \times n$

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13. 13.

    Add 57 and 30.

    Formula:Addition

    $\text{sum} = a + b$

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14. 14.

    How many tens are there in the number 58?

    Formula:Place Value

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

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15. 15.

    What is double 6?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    What is 10 − 3?

    Formula:Subtraction

    $\text{difference} = a - b$

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17. 17.

    Fill in the missing number: 10 + ___ = 17.

    Formula:Missing Addend

    $b = \text{total} - a$

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18. 18.

    Add 20 + 15 + 3.

    Formula:Addition of Three Numbers

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

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19. 19.

    What is half of 24?

    Formula:Halving

    $h = n \div 2$

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20. 20.

    Add 16 + 9 + 9.

    Formula:Addition of Three Numbers

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

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