Year 9 Best Buys and Unit Prices Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 9 ratio & rates worksheet.
Year 9 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 $1.20 for 250 mL. What is the price per 100 mL?
Answer: $0.48
- $1.20 ÷ 2.5 = $0.48 per 100 mL
2.Pasta costs $2.55 for 500 g. What is the price per 100 g?
Answer: $0.51
- $2.55 ÷ 5 = $0.51 per 100 g
3.Pasta costs $2.65 for 500 g. What is the price per 100 g?
Answer: $0.53
- $2.65 ÷ 5 = $0.53 per 100 g
4.Pencils costs $2.94 for a pack of 6. What is the price per pencil?
Answer: $0.49
- $2.94 ÷ 6 = $0.49 per pencil
5.Juice costs $8.20 for 2 L. What is the price per 100 mL?
Answer: $0.41
- $8.20 ÷ 20 = $0.41 per 100 mL
6.Rice costs $7.00 for 1 kg. What is the price per 100 g?
Answer: $0.70
- $7.00 ÷ 10 = $0.70 per 100 g
7.Juice costs $16.80 for 2 L. What is the price per 100 mL?
Answer: $0.84
- $16.80 ÷ 20 = $0.84 per 100 mL
8.Pencils costs $10.08 for a pack of 24. What is the price per pencil?
Answer: $0.42
- $10.08 ÷ 24 = $0.42 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.