South Korea · Grade 2 · Practice Sheet 43

1. 1.

   How many tens are there in the number 89?

   Formula:Place Value

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

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2. 2.

   Continue the pattern by counting in 2s: 6, 8, ___

   Formula:Skip Counting

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

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3. 3.

   Add 66 and 54.

   Formula:Addition

   $\text{sum} = a + b$

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4. 4.

   How many tens are there in the number 42?

   Formula:Place Value

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

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5. 5.

   Add 11 + 8 + 10.

   Formula:Addition of Three Numbers

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

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6. 6.

   What is double 15?

   Formula:Doubling

   $d = 2 \times n$

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7. 7.

   Add 72 and 35.

   Formula:Addition

   $\text{sum} = a + b$

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8. 8.

   What is 14 − 2?

   Formula:Subtraction

   $\text{difference} = a - b$

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9. 9.

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

   Formula:Skip Counting

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

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10. 10.

    Fill in the missing number: 11 + ___ = 13.

    Formula:Missing Addend

    $b = \text{total} - a$

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11. 11.

    What is 2 × 7?

    Formula:Multiplication (Times Tables)

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

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12. 12.

    There are 6 bags with 6 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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13. 13.

    What is 15 − 4?

    Formula:Subtraction

    $\text{difference} = a - b$

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14. 14.

    What is 5 + 3?

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    What is double 18?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    Continue the pattern by counting in 2s: 6, 8, ___

    Formula:Skip Counting

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

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17. 17.

    Fill in the missing number: 11 + ___ = 15.

    Formula:Missing Addend

    $b = \text{total} - a$

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18. 18.

    What is half of 4?

    Formula:Halving

    $h = n \div 2$

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19. 19.

    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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20. 20.

    How many tens are there in the number 79?

    Formula:Place Value

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

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