Year 9 Best Buys and Unit Prices Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the Year 9 ratio & rates worksheet.
Year 9 Best Buys and Unit Prices Worksheet — Level 1 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your working.
1.Rice costs $7.30 for 1 kg. What is the price per 100 g?
Answer: $0.73
- $7.30 ÷ 10 = $0.73 per 100 g
2.Juice costs $3.20 for 1 L. What is the price per 100 mL?
Answer: $0.32
- $3.20 ÷ 10 = $0.32 per 100 mL
3.Oats costs $14.40 for 2 kg. What is the price per 100 g?
Answer: $0.72
- $14.40 ÷ 20 = $0.72 per 100 g
4.Oats costs $5.00 for 2 kg. What is the price per 100 g?
Answer: $0.25
- $5.00 ÷ 20 = $0.25 per 100 g
5.Pasta costs $1.30 for 250 g. What is the price per 100 g?
Answer: $0.52
- $1.30 ÷ 2.5 = $0.52 per 100 g
6.Juice costs $7.80 for 2 L. What is the price per 100 mL?
Answer: $0.39
- $7.80 ÷ 20 = $0.39 per 100 mL
7.Rice costs $6.90 for 1 kg. What is the price per 100 g?
Answer: $0.69
- $6.90 ÷ 10 = $0.69 per 100 g
8.Pasta costs $8.20 for 1 kg. What is the price per 100 g?
Answer: $0.82
- $8.20 ÷ 10 = $0.82 per 100 g
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.