South Korea · Grade 3 · Practice Sheet 49

1. 1.

   Subtract 45 from 93.

   Formula:Subtraction

   $\text{difference} = a - b$

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2. 2.

   Fill in the missing number: 10 + ___ = 19.

   Formula:Missing Addend

   $b = \text{total} - a$

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3. 3.

   What is 7 × 6?

   Formula:Multiplication (Times Tables)

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

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4. 4.

   What is half of 28?

   Formula:Halving

   $h = n \div 2$

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5. 5.

   What is double 8?

   Formula:Doubling

   $d = 2 \times n$

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6. 6.

   Subtract 34 from 75.

   Formula:Subtraction

   $\text{difference} = a - b$

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7. 7.

   How many tens are there in the number 84?

   Formula:Place Value

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

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8. 8.

   There are 5 bags with 8 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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9. 9.

   You have ₩5 and ₩3. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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10. 10.

    Fill in the missing number: 11 + ___ = 21.

    Formula:Missing Addend

    $b = \text{total} - a$

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11. 11.

    What is double 8?

    Formula:Doubling

    $d = 2 \times n$

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12. 12.

    How many tens are there in the number 34?

    Formula:Place Value

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

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13. 13.

    What is 2 × 9?

    Formula:Multiplication (Times Tables)

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

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14. 14.

    Continue the pattern by counting in 5s: 0, 5, ___

    Formula:Skip Counting

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

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15. 15.

    Add 17 + 20 + 18.

    Formula:Addition of Three Numbers

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

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16. 16.

    What is 4 × 2?

    Formula:Multiplication (Times Tables)

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

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17. 17.

    Add 7 + 19 + 15.

    Formula:Addition of Three Numbers

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

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18. 18.

    36 sweets are shared equally among 6 children. How many does each child get?

    Formula:Division (Equal Sharing)

    $\text{each} = \text{total} \div \text{groups}$

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19. 19.

    What is double 11?

    Formula:Doubling

    $d = 2 \times n$

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20. 20.

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

    Formula:Skip Counting

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

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