Hong Kong · Grade 4 · Practice Sheet 20

1. 1.

   Find the area of a square with side length 9 cm.

   Formula:Area of a Square

   $A = s^2$

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2. 2.

   Calculate 117 ÷ 3.

   Formula:Division

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

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3. 3.

   Find the perimeter of a rectangle measuring 14 m by 21 m.

   Formula:Perimeter of a Rectangle

   $P = 2(l + w)$

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4. 4.

   An item costs HK$ 3.12 and you pay with HK$ 10. How much change do you get?

   Formula:Change Due

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

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5. 5.

   Convert 4.58 kilometres into metres.

   Formula:Metric Length Conversion

   $1\,\text{km} = 1000\,\text{m}$

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6. 6.

   One item costs HK$ 2.86. Find the total cost of 5 items.

   Formula:Total Cost

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

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7. 7.

   A rectangle is 12 cm long and 26 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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8. 8.

   What is 10 × 8?

   Formula:Multiplication (Times Tables)

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

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9. 9.

   Find 2/3 of 15.

   Formula:Fraction of a Quantity

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

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10. 10.

    A rectangle is 38 cm long and 10 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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11. 11.

    Find the mean (average) of these numbers: 41, 35, 27, 59, 46.

    Formula:Arithmetic Mean

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

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12. 12.

    What is 9 × 8?

    Formula:Multiplication (Times Tables)

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

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13. 13.

    Find the perimeter of a rectangle measuring 41 m by 33 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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14. 14.

    Calculate 340 ÷ 10.

    Formula:Division

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

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15. 15.

    Find the mean (average) of these numbers: 37, 12, 92, 23, 29.

    Formula:Arithmetic Mean

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

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16. 16.

    Calculate 324 ÷ 9.

    Formula:Division

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

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17. 17.

    Calculate 72 × 6.

    Formula:Multiplication

    $p = a \times b$

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18. 18.

    Find the area of a square with side length 26 cm.

    Formula:Area of a Square

    $A = s^2$

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19. 19.

    Find 2/4 of 56.

    Formula:Fraction of a Quantity

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

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20. 20.

    Calculate 216 ÷ 8.

    Formula:Division

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

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