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Year 8 Measurement Answers

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Year 8 Measurement Answers worksheet preview

Year 8 Measurement Answers

Measurement tools illustration

📐 Part 1: Multiple Choice Answers

1. What is 2.5 metres in centimetres?

25 cm

250 cm

2500 cm

0.25 cm

2. Which unit would be most appropriate for measuring the mass of a car?

grams

kilograms

tonnes

milligrams

3. The area of a rectangle with length 8m and width 5m is:

13 m²

26 m²

40 m²

80 m²

4. Which of these measurements are equivalent? (Select all that apply)

1.5 kg and 1500 g

2.3 m and 230 cm

0.75 L and 750 mL

4.2 km and 42 m

✏️ Part 2: Short Answer Solutions

5. Convert 3.2 kilometres to metres. Show your working.

Answer: 3200 metres

Working: 3.2 km × 1000 = 3200 m

(1 kilometre = 1000 metres)

6. Calculate the perimeter of a square with sides measuring 12.5 cm.

Answer: 50 cm

Working: Perimeter = 4 × side length

P = 4 × 12.5 = 50 cm

7. A recipe calls for 450g of flour. How many kilograms is this?

Answer: 0.45 kg

Working: 450g ÷ 1000 = 0.45 kg

🧮 Part 3: Problem Solving Solutions

8. Sarah is painting a rectangular wall that measures 4.2m by 3.8m. If one litre of paint covers 8m², how many litres will she need? Round to the nearest whole litre.

Answer: 2 litres

Working:

Step 1: Calculate area = 4.2 × 3.8 = 15.96 m²

Step 2: Paint needed = 15.96 ÷ 8 = 1.995 litres

Step 3: Round up to 2 litres (always round up for paint)

9. A water tank holds 2500 litres when full. If 1.8 kilolitres have been used, how many litres remain?

Answer: 700 litres

Working:

Step 1: Convert 1.8 kL to litres = 1.8 × 1000 = 1800 L

Step 2: Remaining = 2500 - 1800 = 700 litres

10. Explain why it's important to use appropriate units when measuring. Give two examples.

Sample Answer:

Using appropriate units ensures accuracy and makes measurements meaningful.
Example 1: Measuring a person's height in kilometres would be impractical
- better to use metres or centimetres.
Example 2: Measuring medicine doses in kilograms would be dangerous
- milligrams or grams are more appropriate for precision.

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