South Korea · Grade 2 · Practice Sheet 27

1. 1.

   What is 8 + 2?

   Formula:Addition

   $\text{sum} = a + b$

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2. 2.

   Fill in the missing number: 10 + ___ = 22.

   Formula:Missing Addend

   $b = \text{total} - a$

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3. 3.

   What is half of 50?

   Formula:Halving

   $h = n \div 2$

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4. 4.

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

   Formula:Skip Counting

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

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5. 5.

   Fill in the missing number: 4 + ___ = 10.

   Formula:Missing Addend

   $b = \text{total} - a$

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6. 6.

   Add 31 and 17.

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   Fill in the missing number: 2 + ___ = 15.

   Formula:Missing Addend

   $b = \text{total} - a$

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8. 8.

   How many tens are there in the number 76?

   Formula:Place Value

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

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9. 9.

   What is double 2?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    Add 20 and 55.

    Formula:Addition

    $\text{sum} = a + b$

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11. 11.

    What is 13 − 12?

    Formula:Subtraction

    $\text{difference} = a - b$

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12. 12.

    What is 8 + 7?

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

    Subtract 11 from 50.

    Formula:Subtraction

    $\text{difference} = a - b$

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14. 14.

    Fill in the missing number: 6 + ___ = 8.

    Formula:Missing Addend

    $b = \text{total} - a$

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15. 15.

    What is 7 − 1?

    Formula:Subtraction

    $\text{difference} = a - b$

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16. 16.

    There are 6 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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17. 17.

    What is 18 − 13?

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    Add 12 + 14 + 3.

    Formula:Addition of Three Numbers

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

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19. 19.

    What is double 13?

    Formula:Doubling

    $d = 2 \times n$

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20. 20.

    There are 2 bags with 3 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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