Hong Kong · Grade 4 · Practice Sheet 45

1. 1.

   Find the mean (average) of these numbers: 44, 19, 73, 17.

   Formula:Arithmetic Mean

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

   View formula →
2. 2.

   A rectangle is 12 cm long and 12 cm wide. Find its area.

   Formula:Area of a Rectangle

   $A = l \times w$

   View formula →
3. 3.

   Calculate 85 × 7.

   Formula:Multiplication

   $p = a \times b$

   View formula →
4. 4.

   An item costs HK$ 26.42 and you pay with HK$ 40. How much change do you get?

   Formula:Change Due

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

   View formula →
5. 5.

   Find the perimeter of a rectangle measuring 16 m by 31 m.

   Formula:Perimeter of a Rectangle

   $P = 2(l + w)$

   View formula →
6. 6.

   Calculate 41 × 9.

   Formula:Multiplication

   $p = a \times b$

   View formula →
7. 7.

   One item costs HK$ 21.98. Find the total cost of 20 items.

   Formula:Total Cost

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

   View formula →
8. 8.

   Calculate 156 ÷ 4.

   Formula:Division

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

   View formula →
9. 9.

   One item costs HK$ 9.04. Find the total cost of 14 items.

   Formula:Total Cost

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

   View formula →
10. 10.

    Calculate 78 × 9.

    Formula:Multiplication

    $p = a \times b$

    View formula →
11. 11.

    Find the area of a square with side length 27 cm.

    Formula:Area of a Square

    $A = s^2$

    View formula →
12. 12.

    Find the perimeter of a rectangle measuring 29 m by 16 m.

    Formula:Perimeter of a Rectangle

    $P = 2(l + w)$

    View formula →
13. 13.

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

    Formula:Division (Equal Sharing)

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

    View formula →
14. 14.

    One item costs HK$ 3.27. Find the total cost of 12 items.

    Formula:Total Cost

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

    View formula →
15. 15.

    Find the mean (average) of these numbers: 18, 69, 93, 39, 66.

    Formula:Arithmetic Mean

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

    View formula →
16. 16.

    Find 1/2 of 40.

    Formula:Fraction of a Quantity

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

    View formula →
17. 17.

    One item costs HK$ 10.92. Find the total cost of 11 items.

    Formula:Total Cost

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

    View formula →
18. 18.

    Calculate 94 × 5.

    Formula:Multiplication

    $p = a \times b$

    View formula →
19. 19.

    Convert 8.55 kilometres into metres.

    Formula:Metric Length Conversion

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

    View formula →
20. 20.

    Calculate 60 × 10.

    Formula:Multiplication

    $p = a \times b$

    View formula →

© FormulaWon — formulawon.app · Answers & step-by-step working available on the solutions sheet.