Year 8 Measurement Answers
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Year 8 Measurement Answers
📏 Part 1: Multiple Choice Answers
✏️ Part 2: Short Answer Solutions
Answer: 3200 g
Working: 3.2 kg × 1000 = 3200 g
Explanation: To convert kg to g, multiply by 1000
Answer: 28 cm
Working: Perimeter = 7 + 9 + 12 = 28 cm
Explanation: Perimeter is the sum of all side lengths
Answer: 12.6 m²
Working: Area = length × width = 4.5 × 2.8 = 12.6 m²
Explanation: Area of rectangle = l × w
Sample Answer: We use different units because measurements vary greatly in size. Using appropriate units makes numbers easier to work with and understand. For example:
• We measure the distance between cities in kilometres rather than centimetres because the numbers would be too large
• We measure the thickness of paper in millimetres rather than metres because it would give very small decimal numbers
🧮 Part 3: Problem Solving Solutions
Answer: 1.75 L
Working:
Convert 250 mL to litres: 250 ÷ 1000 = 0.25 L
Total volume = 0.25 L + 1.5 L = 1.75 L
Explanation: Convert to same units first, then add
Answer: 375 m³
Working:
Volume = length × width × height
Volume = 25 × 10 × 1.5 = 375 m³
Explanation: Volume of rectangular prism = l × w × h
Sample Answer:
Estimate: Approximately 60 m² (reasonable classroom size)
Method: Measure length and width using metre rulers or measuring tape
Example calculation: If length = 8 m and width = 7.5 m, then Area = 8 × 7.5 = 60 m²
Reasoning: Classrooms are typically rectangular, so we use Area = length × width formula
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