Year 7 Best Buys and Unit Prices Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 7 ratio & rates worksheet.
Year 7 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.Rice costs $11.40 for 2 kg. What is the price per 100 g?
Answer: $0.57
- $11.40 ÷ 20 = $0.57 per 100 g
2.Juice costs $8.00 for 2 L. What is the price per 100 mL?
Answer: $0.40
- $8.00 ÷ 20 = $0.40 per 100 mL
3.Pencils costs $1.98 for a pack of 6. What is the price per pencil?
Answer: $0.33
- $1.98 ÷ 6 = $0.33 per pencil
4.Pencils costs $2.40 for a pack of 12. What is the price per pencil?
Answer: $0.20
- $2.40 ÷ 12 = $0.20 per pencil
5.Oats costs $8.70 for 1 kg. What is the price per 100 g?
Answer: $0.87
- $8.70 ÷ 10 = $0.87 per 100 g
6.Oats costs $2.00 for 500 g. What is the price per 100 g?
Answer: $0.40
- $2.00 ÷ 5 = $0.40 per 100 g
7.Rice costs $8.30 for 1 kg. What is the price per 100 g?
Answer: $0.83
- $8.30 ÷ 10 = $0.83 per 100 g
8.Rice costs $1.45 for 500 g. What is the price per 100 g?
Answer: $0.29
- $1.45 ÷ 5 = $0.29 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.
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