South Africa · Grade 4 · Practice Sheet 3

1. 1.

   Find the perimeter of a rectangle measuring 24 m by 26 m.

   Formula:Perimeter of a Rectangle

   $P = 2(l + w)$

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2. 2.

   An item costs R19.36 and you pay with R20. How much change do you get?

   Formula:Change Due

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

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3. 3.

   Calculate 105 ÷ 7.

   Formula:Division

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

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4. 4.

   Calculate 13 × 11.

   Formula:Multiplication

   $p = a \times b$

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5. 5.

   Find the mean (average) of these numbers: 75, 88, 75, 14.

   Formula:Arithmetic Mean

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

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6. 6.

   Calculate 132 ÷ 4.

   Formula:Division

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

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7. 7.

   Convert 7.41 kilometres into metres.

   Formula:Metric Length Conversion

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

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8. 8.

   Calculate 68 × 8.

   Formula:Multiplication

   $p = a \times b$

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9. 9.

   Calculate 156 ÷ 4.

   Formula:Division

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

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10. 10.

    Find the perimeter of a rectangle measuring 15 m by 23 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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11. 11.

    Find 7/8 of 104.

    Formula:Fraction of a Quantity

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

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12. 12.

    One item costs R1.51. Find the total cost of 15 items.

    Formula:Total Cost

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

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13. 13.

    Calculate 55 × 10.

    Formula:Multiplication

    $p = a \times b$

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14. 14.

    Find the perimeter of a rectangle measuring 15 m by 16 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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15. 15.

    Find the mean (average) of these numbers: 34, 66, 57, 33.

    Formula:Arithmetic Mean

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

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16. 16.

    An item costs R32.23 and you pay with R40. How much change do you get?

    Formula:Change Due

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

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17. 17.

    One item costs R15.98. Find the total cost of 4 items.

    Formula:Total Cost

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

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18. 18.

    Convert 2.56 kilometres into metres.

    Formula:Metric Length Conversion

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

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19. 19.

    Find 2/5 of 30.

    Formula:Fraction of a Quantity

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

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20. 20.

    One item costs R2.4. Find the total cost of 3 items.

    Formula:Total Cost

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

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