Hong Kong · Grade 4 · Practice Sheet 47

1. 1.

   An item costs HK$ 25.77 and you pay with HK$ 40. How much change do you get?

   Formula:Change Due

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

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2. 2.

   Convert 5.01 kilometres into metres.

   Formula:Metric Length Conversion

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

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3. 3.

   Find 3/8 of 56.

   Formula:Fraction of a Quantity

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

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4. 4.

   One item costs HK$ 21.52. Find the total cost of 18 items.

   Formula:Total Cost

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

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5. 5.

   Find 2/3 of 12.

   Formula:Fraction of a Quantity

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

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6. 6.

   A rectangle is 21 cm long and 27 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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7. 7.

   Calculate 71 × 3.

   Formula:Multiplication

   $p = a \times b$

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8. 8.

   Find 2/3 of 36.

   Formula:Fraction of a Quantity

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

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9. 9.

   Calculate 68 × 9.

   Formula:Multiplication

   $p = a \times b$

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10. 10.

    One item costs HK$ 24.74. Find the total cost of 6 items.

    Formula:Total Cost

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

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11. 11.

    Calculate 67 × 8.

    Formula:Multiplication

    $p = a \times b$

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12. 12.

    Calculate 87 ÷ 3.

    Formula:Division

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

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13. 13.

    Find the mean (average) of these numbers: 25, 26, 90, 79, 76, 12.

    Formula:Arithmetic Mean

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

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14. 14.

    Find the area of a square with side length 5 cm.

    Formula:Area of a Square

    $A = s^2$

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15. 15.

    An item costs HK$ 18.88 and you pay with HK$ 20. How much change do you get?

    Formula:Change Due

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

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16. 16.

    Calculate 42 ÷ 7.

    Formula:Division

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

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17. 17.

    Find the mean (average) of these numbers: 80, 22, 19, 67.

    Formula:Arithmetic Mean

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

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18. 18.

    Calculate 210 ÷ 7.

    Formula:Division

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

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19. 19.

    Find 1/2 of 8.

    Formula:Fraction of a Quantity

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

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20. 20.

    Calculate 84 ÷ 6.

    Formula:Division

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

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