Brazil · Ano 4 · Practice Sheet 9

1. 1.

   Calculate 117 ÷ 3.

   Formula:Division

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

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2. 2.

   Find the area of a square with side length 15 cm.

   Formula:Area of a Square

   $A = s^2$

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3. 3.

   One item costs R$ 1.92. Find the total cost of 11 items.

   Formula:Total Cost

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

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4. 4.

   A rectangle is 16 cm long and 27 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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5. 5.

   Calculate 120 ÷ 6.

   Formula:Division

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

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6. 6.

   Find 4/5 of 90.

   Formula:Fraction of a Quantity

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

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7. 7.

   Calculate 20 × 12.

   Formula:Multiplication

   $p = a \times b$

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8. 8.

   Find the mean (average) of these numbers: 54, 37, 13, 33, 22.

   Formula:Arithmetic Mean

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

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9. 9.

   An item costs R$ 38.22 and you pay with R$ 40. How much change do you get?

   Formula:Change Due

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

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10. 10.

    A rectangle is 30 cm long and 19 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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11. 11.

    Find the area of a square with side length 29 cm.

    Formula:Area of a Square

    $A = s^2$

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12. 12.

    A rectangle is 14 cm long and 5 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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13. 13.

    One item costs R$ 23.68. Find the total cost of 19 items.

    Formula:Total Cost

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

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14. 14.

    What is 2 × 7?

    Formula:Multiplication (Times Tables)

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

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15. 15.

    Find 1/4 of 68.

    Formula:Fraction of a Quantity

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

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16. 16.

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

    Formula:Area of a Square

    $A = s^2$

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17. 17.

    What is 3 × 4?

    Formula:Multiplication (Times Tables)

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

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18. 18.

    Calculate 408 ÷ 12.

    Formula:Division

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

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19. 19.

    Find the mean (average) of these numbers: 13, 66, 27, 35.

    Formula:Arithmetic Mean

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

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20. 20.

    Calculate 31 × 5.

    Formula:Multiplication

    $p = a \times b$

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