South Korea · Grade 3 · Practice Sheet 43

1. 1.

   What is double 14?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   What is 2 × 8?

   Formula:Multiplication (Times Tables)

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

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3. 3.

   There are 5 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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4. 4.

   Add 12 + 20 + 14.

   Formula:Addition of Three Numbers

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

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5. 5.

   There are 4 bags with 7 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.

   Fill in the missing number: 2 + ___ = 5.

   Formula:Missing Addend

   $b = \text{total} - a$

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7. 7.

   Continue the pattern by counting in 5s: 20, 25, ___

   Formula:Skip Counting

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

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8. 8.

   What is half of 32?

   Formula:Halving

   $h = n \div 2$

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9. 9.

   Continue the pattern by counting in 3s: 12, 15, ___

   Formula:Skip Counting

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

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10. 10.

    Subtract 33 from 39.

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    Fill in the missing number: 15 + ___ = 19.

    Formula:Missing Addend

    $b = \text{total} - a$

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12. 12.

    Subtract 43 from 58.

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    There are 5 bags with 2 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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14. 14.

    Fill in the missing number: 2 + ___ = 10.

    Formula:Missing Addend

    $b = \text{total} - a$

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15. 15.

    What is double 5?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    Continue the pattern by counting in 10s: 0, 10, ___

    Formula:Skip Counting

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

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17. 17.

    Add 73 and 57.

    Formula:Addition

    $\text{sum} = a + b$

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18. 18.

    Continue the pattern by counting in 5s: 10, 15, ___

    Formula:Skip Counting

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

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19. 19.

    Add 8 + 18 + 15.

    Formula:Addition of Three Numbers

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

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20. 20.

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

    Formula:Skip Counting

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

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