Year 8 Best Buys and Unit Prices Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 8 ratio & rates worksheet.
Year 8 Best Buys and Unit Prices Worksheet — Level 1 — Practice Set 3 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your working.
1.Juice costs $1.40 for 250 mL. What is the price per 100 mL?
Answer: $0.56
- $1.40 ÷ 2.5 = $0.56 per 100 mL
2.Oats costs $4.20 for 2 kg. What is the price per 100 g?
Answer: $0.21
- $4.20 ÷ 20 = $0.21 per 100 g
3.Oats costs $2.50 for 1 kg. What is the price per 100 g?
Answer: $0.25
- $2.50 ÷ 10 = $0.25 per 100 g
4.Rice costs $2.10 for 500 g. What is the price per 100 g?
Answer: $0.42
- $2.10 ÷ 5 = $0.42 per 100 g
5.Oats costs $3.45 for 500 g. What is the price per 100 g?
Answer: $0.69
- $3.45 ÷ 5 = $0.69 per 100 g
6.Rice costs $15.20 for 2 kg. What is the price per 100 g?
Answer: $0.76
- $15.20 ÷ 20 = $0.76 per 100 g
7.Pasta costs $0.50 for 250 g. What is the price per 100 g?
Answer: $0.20
- $0.50 ÷ 2.5 = $0.20 per 100 g
8.Juice costs $11.00 for 2 L. What is the price per 100 mL?
Answer: $0.55
- $11.00 ÷ 20 = $0.55 per 100 mL
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.