Year 8 Best Buys and Unit Prices Worksheet — Level 1 — Practice Set 4 — 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 4 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your working.
1.Rice costs $7.00 for 2 kg. What is the price per 100 g?
Answer: $0.35
- $7.00 ÷ 20 = $0.35 per 100 g
2.Oats costs $16.00 for 2 kg. What is the price per 100 g?
Answer: $0.80
- $16.00 ÷ 20 = $0.80 per 100 g
3.Oats costs $3.65 for 500 g. What is the price per 100 g?
Answer: $0.73
- $3.65 ÷ 5 = $0.73 per 100 g
4.Rice costs $2.15 for 500 g. What is the price per 100 g?
Answer: $0.43
- $2.15 ÷ 5 = $0.43 per 100 g
5.Pencils costs $5.28 for a pack of 24. What is the price per pencil?
Answer: $0.22
- $5.28 ÷ 24 = $0.22 per pencil
6.Pencils costs $5.40 for a pack of 6. What is the price per pencil?
Answer: $0.90
- $5.40 ÷ 6 = $0.90 per pencil
7.Juice costs $7.90 for 1 L. What is the price per 100 mL?
Answer: $0.79
- $7.90 ÷ 10 = $0.79 per 100 mL
8.Pencils costs $4.68 for a pack of 6. What is the price per pencil?
Answer: $0.78
- $4.68 ÷ 6 = $0.78 per pencil
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.