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 $17.60 for 2 L. What is the price per 100 mL?
Answer: $0.88
- $17.60 ÷ 20 = $0.88 per 100 mL
2.Pasta costs $3.30 for 1 kg. What is the price per 100 g?
Answer: $0.33
- $3.30 ÷ 10 = $0.33 per 100 g
3.Pencils costs $4.38 for a pack of 6. What is the price per pencil?
Answer: $0.73
- $4.38 ÷ 6 = $0.73 per pencil
4.Oats costs $14.20 for 2 kg. What is the price per 100 g?
Answer: $0.71
- $14.20 ÷ 20 = $0.71 per 100 g
5.Pencils costs $3.72 for a pack of 6. What is the price per pencil?
Answer: $0.62
- $3.72 ÷ 6 = $0.62 per pencil
6.Pasta costs $6.60 for 1 kg. What is the price per 100 g?
Answer: $0.66
- $6.60 ÷ 10 = $0.66 per 100 g
7.Oats costs $2.10 for 500 g. What is the price per 100 g?
Answer: $0.42
- $2.10 ÷ 5 = $0.42 per 100 g
8.Juice costs $1.85 for 250 mL. What is the price per 100 mL?
Answer: $0.74
- $1.85 ÷ 2.5 = $0.74 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.