Ireland · Year 4 · Practice Sheet 18

1. 1.

   A rectangle is 8 cm long and 14 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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2. 2.

   Convert 11.9 kilometres into metres.

   Formula:Metric Length Conversion

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

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3. 3.

   One item costs €12.27. Find the total cost of 15 items.

   Formula:Total Cost

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

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4. 4.

   Find the mean (average) of these numbers: 71, 60, 56, 77.

   Formula:Arithmetic Mean

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

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5. 5.

   Convert 3.25 kilometres into metres.

   Formula:Metric Length Conversion

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

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6. 6.

   A rectangle is 7 cm long and 30 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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7. 7.

   Find the perimeter of a rectangle measuring 15 m by 6 m.

   Formula:Perimeter of a Rectangle

   $P = 2(l + w)$

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8. 8.

   Find the mean (average) of these numbers: 10, 17, 35, 19, 57.

   Formula:Arithmetic Mean

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

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9. 9.

   Calculate 13 × 5.

   Formula:Multiplication

   $p = a \times b$

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10. 10.

    One item costs €18.43. Find the total cost of 11 items.

    Formula:Total Cost

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

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11. 11.

    Find the mean (average) of these numbers: 21, 25, 43, 34.

    Formula:Arithmetic Mean

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

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12. 12.

    Calculate 56 × 12.

    Formula:Multiplication

    $p = a \times b$

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13. 13.

    An item costs €26.45 and you pay with €40. How much change do you get?

    Formula:Change Due

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

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14. 14.

    A rectangle is 10 cm long and 16 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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15. 15.

    What is 3 × 9?

    Formula:Multiplication (Times Tables)

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

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16. 16.

    Calculate 306 ÷ 9.

    Formula:Division

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

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17. 17.

    Find the mean (average) of these numbers: 25, 77, 17, 79, 39, 59.

    Formula:Arithmetic Mean

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

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18. 18.

    Calculate 56 ÷ 4.

    Formula:Division

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

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19. 19.

    A rectangle is 18 cm long and 23 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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20. 20.

    What is 4 × 7?

    Formula:Multiplication (Times Tables)

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

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