Brazil · Ano 4 · Practice Sheet 26

1. 1.

   Find the mean (average) of these numbers: 86, 74, 52, 32.

   Formula:Arithmetic Mean

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

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2. 2.

   Find 2/3 of 51.

   Formula:Fraction of a Quantity

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

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3. 3.

   Calculate 95 × 4.

   Formula:Multiplication

   $p = a \times b$

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4. 4.

   What is 4 × 2?

   Formula:Multiplication (Times Tables)

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

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5. 5.

   Calculate 32 × 4.

   Formula:Multiplication

   $p = a \times b$

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6. 6.

   Calculate 68 ÷ 4.

   Formula:Division

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

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7. 7.

   15 sweets are shared equally among 3 children. How many does each child get?

   Formula:Division (Equal Sharing)

   $\text{each} = \text{total} \div \text{groups}$

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8. 8.

   Find the mean (average) of these numbers: 81, 31, 59, 45, 65, 12.

   Formula:Arithmetic Mean

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

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9. 9.

   Find 4/5 of 20.

   Formula:Fraction of a Quantity

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

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10. 10.

    Convert 4.78 kilometres into metres.

    Formula:Metric Length Conversion

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

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11. 11.

    Find the perimeter of a rectangle measuring 32 m by 22 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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12. 12.

    Calculate 30 × 6.

    Formula:Multiplication

    $p = a \times b$

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13. 13.

    Convert 10.87 kilometres into metres.

    Formula:Metric Length Conversion

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

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14. 14.

    Find the area of a square with side length 7 cm.

    Formula:Area of a Square

    $A = s^2$

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15. 15.

    An item costs R$ 7.6 and you pay with R$ 20. How much change do you get?

    Formula:Change Due

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

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16. 16.

    Find the perimeter of a rectangle measuring 28 m by 9 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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17. 17.

    One item costs R$ 11.97. Find the total cost of 5 items.

    Formula:Total Cost

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

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18. 18.

    Calculate 108 ÷ 4.

    Formula:Division

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

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19. 19.

    6 sweets are shared equally among 3 children. How many does each child get?

    Formula:Division (Equal Sharing)

    $\text{each} = \text{total} \div \text{groups}$

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20. 20.

    Find the perimeter of a rectangle measuring 34 m by 26 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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