Singapore · Grade 4 · Practice Sheet 50

1. 1.

   Convert 10.92 kilometres into metres.

   Formula:Metric Length Conversion

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

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2. 2.

   A rectangle is 5 cm long and 30 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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3. 3.

   An item costs $11.7 and you pay with $30. How much change do you get?

   Formula:Change Due

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

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4. 4.

   A rectangle is 29 cm long and 28 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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5. 5.

   Find the area of a square with side length 3 cm.

   Formula:Area of a Square

   $A = s^2$

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6. 6.

   Calculate 24 ÷ 3.

   Formula:Division

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

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7. 7.

   One item costs $9.13. Find the total cost of 7 items.

   Formula:Total Cost

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

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8. 8.

   What is 7 × 9?

   Formula:Multiplication (Times Tables)

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

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9. 9.

   Find the mean (average) of these numbers: 34, 41, 37, 39.

   Formula:Arithmetic Mean

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

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10. 10.

    Convert 8.25 kilometres into metres.

    Formula:Metric Length Conversion

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

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11. 11.

    Calculate 120 ÷ 4.

    Formula:Division

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

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12. 12.

    Find the perimeter of a rectangle measuring 26 m by 10 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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13. 13.

    Convert 1.32 kilometres into metres.

    Formula:Metric Length Conversion

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

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14. 14.

    Calculate 45 × 10.

    Formula:Multiplication

    $p = a \times b$

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15. 15.

    Find the area of a square with side length 12 cm.

    Formula:Area of a Square

    $A = s^2$

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16. 16.

    Convert 6.73 kilometres into metres.

    Formula:Metric Length Conversion

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

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17. 17.

    Find 1/4 of 16.

    Formula:Fraction of a Quantity

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

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18. 18.

    Calculate 84 × 9.

    Formula:Multiplication

    $p = a \times b$

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19. 19.

    Convert 2.21 kilometres into metres.

    Formula:Metric Length Conversion

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

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20. 20.

    Find the perimeter of a rectangle measuring 25 m by 10 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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