South Korea · Grade 4 · Practice Sheet 6

1. 1.

   Find 1/4 of 20.

   Formula:Fraction of a Quantity

   $\text{result} = \dfrac{a}{b} \times N$

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2. 2.

   35 sweets are shared equally among 5 children. How many does each child get?

   Formula:Division (Equal Sharing)

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

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3. 3.

   Find the perimeter of a rectangle measuring 44 m by 12 m.

   Formula:Perimeter of a Rectangle

   $P = 2(l + w)$

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4. 4.

   Calculate 55 × 6.

   Formula:Multiplication

   $p = a \times b$

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5. 5.

   Find the mean (average) of these numbers: 19, 74, 73, 95, 48, 71.

   Formula:Arithmetic Mean

   $\bar{x} = \dfrac{\sum x}{n}$

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6. 6.

   Calculate 46 × 10.

   Formula:Multiplication

   $p = a \times b$

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7. 7.

   48 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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8. 8.

   Calculate 64 × 11.

   Formula:Multiplication

   $p = a \times b$

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9. 9.

   One item costs ₩12.38. Find the total cost of 19 items.

   Formula:Total Cost

   $\text{total} = \text{price} \times \text{quantity}$

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10. 10.

    Calculate 75 × 4.

    Formula:Multiplication

    $p = a \times b$

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11. 11.

    A rectangle is 34 cm long and 16 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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12. 12.

    Find the perimeter of a rectangle measuring 16 m by 17 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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13. 13.

    What is 10 × 9?

    Formula:Multiplication (Times Tables)

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

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14. 14.

    Find the perimeter of a rectangle measuring 15 m by 34 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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15. 15.

    Calculate 175 ÷ 5.

    Formula:Division

    $q = \dfrac{a}{b}$

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16. 16.

    Calculate 34 × 8.

    Formula:Multiplication

    $p = a \times b$

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17. 17.

    Find the perimeter of a rectangle measuring 22 m by 31 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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18. 18.

    Calculate 17 × 8.

    Formula:Multiplication

    $p = a \times b$

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19. 19.

    Find 3/5 of 80.

    Formula:Fraction of a Quantity

    $\text{result} = \dfrac{a}{b} \times N$

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20. 20.

    What is 6 × 7?

    Formula:Multiplication (Times Tables)

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

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