China · Grade 4 · Practice Sheet 4

1. 1.

   Find the mean (average) of these numbers: 39, 76, 51, 94, 34, 18.

   Formula:Arithmetic Mean

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

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2. 2.

   A rectangle is 30 cm long and 9 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

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3. 3.

   What is 3 × 4?

   Formula:Multiplication (Times Tables)

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

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4. 4.

   One item costs ¥7.42. Find the total cost of 6 items.

   Formula:Total Cost

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

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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.

   Find the mean (average) of these numbers: 20, 51, 95, 63, 59, 42.

   Formula:Arithmetic Mean

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

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7. 7.

   One item costs ¥3.3. Find the total cost of 14 items.

   Formula:Total Cost

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

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8. 8.

   What is 10 × 6?

   Formula:Multiplication (Times Tables)

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

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9. 9.

   Calculate 288 ÷ 9.

   Formula:Division

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

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10. 10.

    What is 5 × 6?

    Formula:Multiplication (Times Tables)

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

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11. 11.

    Calculate 70 ÷ 10.

    Formula:Division

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

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12. 12.

    Find the mean (average) of these numbers: 47, 68, 89, 73, 24, 76.

    Formula:Arithmetic Mean

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

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13. 13.

    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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14. 14.

    Find the perimeter of a rectangle measuring 21 m by 4 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

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15. 15.

    Calculate 96 ÷ 6.

    Formula:Division

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

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16. 16.

    Find the area of a square with side length 6 cm.

    Formula:Area of a Square

    $A = s^2$

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17. 17.

    A rectangle is 33 cm long and 20 cm wide. Find its area.

    Formula:Area of a Rectangle

    $A = l \times w$

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18. 18.

    Find 1/2 of 38.

    Formula:Fraction of a Quantity

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

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19. 19.

    What is 6 × 10?

    Formula:Multiplication (Times Tables)

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

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20. 20.

    Find the mean (average) of these numbers: 57, 43, 24, 30.

    Formula:Arithmetic Mean

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

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