South Korea · Grade 2 · Practice Sheet 24

1. 1.

   What is 1 + 5?

   Formula:Addition

   $\text{sum} = a + b$

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2. 2.

   What is 6 − 3?

   Formula:Subtraction

   $\text{difference} = a - b$

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3. 3.

   What is 8 + 7?

   Formula:Addition

   $\text{sum} = a + b$

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4. 4.

   Add 72 and 50.

   Formula:Addition

   $\text{sum} = a + b$

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5. 5.

   What is double 2?

   Formula:Doubling

   $d = 2 \times n$

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6. 6.

   Fill in the missing number: 2 + ___ = 17.

   Formula:Missing Addend

   $b = \text{total} - a$

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7. 7.

   What is half of 22?

   Formula:Halving

   $h = n \div 2$

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8. 8.

   What is double 17?

   Formula:Doubling

   $d = 2 \times n$

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9. 9.

   What is half of 44?

   Formula:Halving

   $h = n \div 2$

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10. 10.

    What is 9 × 3?

    Formula:Multiplication (Times Tables)

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

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11. 11.

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

    Formula:Adding Money

    $\text{total} = a + b$

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12. 12.

    Add 4 + 6 + 6.

    Formula:Addition of Three Numbers

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

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13. 13.

    Add 74 and 9.

    Formula:Addition

    $\text{sum} = a + b$

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14. 14.

    Continue the pattern by counting in 3s: 3, 6, ___

    Formula:Skip Counting

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

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15. 15.

    You have ₩3 and ₩7. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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16. 16.

    How many tens are there in the number 83?

    Formula:Place Value

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

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17. 17.

    What is 6 − 4?

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    There are 5 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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19. 19.

    What is 10 − 1?

    Formula:Subtraction

    $\text{difference} = a - b$

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20. 20.

    What is 10 × 3?

    Formula:Multiplication (Times Tables)

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

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