South Korea · Grade 2 · Practice Sheet 31

1. 1.

   What is 7 × 10?

   Formula:Multiplication (Times Tables)

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

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2. 2.

   You have ₩9 and ₩2. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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3. 3.

   Subtract 10 from 77.

   Formula:Subtraction

   $\text{difference} = a - b$

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4. 4.

   What is double 9?

   Formula:Doubling

   $d = 2 \times n$

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5. 5.

   There are 4 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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6. 6.

   What is 4 + 4?

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   What is double 19?

   Formula:Doubling

   $d = 2 \times n$

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8. 8.

   Add 21 and 12.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Add 6 + 5 + 17.

   Formula:Addition of Three Numbers

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

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10. 10.

    What is 5 + 3?

    Formula:Addition

    $\text{sum} = a + b$

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11. 11.

    You have ₩6 and ₩2. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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12. 12.

    What is double 10?

    Formula:Doubling

    $d = 2 \times n$

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13. 13.

    What is half of 24?

    Formula:Halving

    $h = n \div 2$

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14. 14.

    Continue the pattern by counting in 2s: 4, 6, ___

    Formula:Skip Counting

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

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15. 15.

    Subtract 6 from 34.

    Formula:Subtraction

    $\text{difference} = a - b$

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16. 16.

    Fill in the missing number: 12 + ___ = 19.

    Formula:Missing Addend

    $b = \text{total} - a$

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17. 17.

    Continue the pattern by counting in 5s: 5, 10, ___

    Formula:Skip Counting

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

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18. 18.

    What is half of 16?

    Formula:Halving

    $h = n \div 2$

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19. 19.

    How many tens are there in the number 16?

    Formula:Place Value

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

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20. 20.

    You have ₩8 and ₩9. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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