Cambodia · Grade 4 · Practice Sheet 10

1. 1.

   Find the mean (average) of these numbers: 44, 34, 27, 68.

   Formula:Arithmetic Mean

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

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2. 2.

   Find 2/3 of 45.

   Formula:Fraction of a Quantity

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

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3. 3.

   An item costs ៛ 29.62 and you pay with ៛ 40. How much change do you get?

   Formula:Change Due

   $\text{change} = \text{paid} - \text{cost}$

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4. 4.

   Calculate 68 × 7.

   Formula:Multiplication

   $p = a \times b$

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5. 5.

   20 sweets are shared equally among 4 children. How many does each child get?

   Formula:Division (Equal Sharing)

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

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6. 6.

   A rectangle is 12 cm long and 21 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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7. 7.

   Find the mean (average) of these numbers: 97, 64, 53, 85, 14, 65.

   Formula:Arithmetic Mean

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

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8. 8.

   A rectangle is 28 cm long and 28 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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9. 9.

   One item costs ៛ 10.02. Find the total cost of 11 items.

   Formula:Total Cost

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

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10. 10.

    Calculate 36 × 3.

    Formula:Multiplication

    $p = a \times b$

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11. 11.

    Calculate 116 ÷ 4.

    Formula:Division

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

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12. 12.

    Find the area of a square with side length 29 cm.

    Formula:Area of a Square

    $A = s^2$

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13. 13.

    Calculate 120 ÷ 5.

    Formula:Division

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

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14. 14.

    A rectangle is 39 cm long and 18 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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15. 15.

    Find the perimeter of a rectangle measuring 33 m by 21 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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16. 16.

    An item costs ៛ 29.23 and you pay with ៛ 40. How much change do you get?

    Formula:Change Due

    $\text{change} = \text{paid} - \text{cost}$

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17. 17.

    What is 10 × 10?

    Formula:Multiplication (Times Tables)

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

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18. 18.

    Find the mean (average) of these numbers: 69, 75, 53, 30, 96, 37.

    Formula:Arithmetic Mean

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

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19. 19.

    What is 5 × 3?

    Formula:Multiplication (Times Tables)

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

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20. 20.

    20 sweets are shared equally among 4 children. How many does each child get?

    Formula:Division (Equal Sharing)

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

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