Year 10 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 10 ratio & rates worksheet.
Success TutoringWorksheetsAnswer sheetYear 10 · Mathematics · Ratio & RatesYear 10 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 2 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your working.
1.Which is better value: oats at $4.40 for 500 g, or at $9.90 for 1 kg?
Answer: $4.40 for 500 g ($0.88 per 100 g)
- First: $4.40 ÷ 5 = $0.88 per 100 g
- Second: $9.90 ÷ 10 = $0.99 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pencils at $2.28 for a pack of 6, or at $11.28 for a pack of 24?
Answer: $2.28 for a pack of 6 ($0.38 per pencil)
- First: $2.28 ÷ 6 = $0.38 per pencil
- Second: $11.28 ÷ 24 = $0.47 per pencil
- The cheaper unit price is better value.
3.Which is better value: pencils at $3.36 for a pack of 6, or at $4.68 for a pack of 12?
Answer: $4.68 for a pack of 12 ($0.39 per pencil)
- First: $3.36 ÷ 6 = $0.56 per pencil
- Second: $4.68 ÷ 12 = $0.39 per pencil
- The cheaper unit price is better value.
4.Which is better value: pencils at $13.68 for a pack of 24, or at $4.32 for a pack of 6?
Answer: $13.68 for a pack of 24 ($0.57 per pencil)
- First: $13.68 ÷ 24 = $0.57 per pencil
- Second: $4.32 ÷ 6 = $0.72 per pencil
- The cheaper unit price is better value.
5.Which is better value: rice at $4.70 for 1 kg, or at $8.20 for 2 kg?
Answer: $8.20 for 2 kg ($0.41 per 100 g)
- First: $4.70 ÷ 10 = $0.47 per 100 g
- Second: $8.20 ÷ 20 = $0.41 per 100 g
- The cheaper unit price is better value.
6.Which is better value: oats at $6.50 for 1 kg, or at $3.50 for 500 g?
Answer: $6.50 for 1 kg ($0.65 per 100 g)
- First: $6.50 ÷ 10 = $0.65 per 100 g
- Second: $3.50 ÷ 5 = $0.70 per 100 g
- The cheaper unit price is better value.
7.Which is better value: pasta at $4.15 for 500 g, or at $2.40 for 250 g?
Answer: $4.15 for 500 g ($0.83 per 100 g)
- First: $4.15 ÷ 5 = $0.83 per 100 g
- Second: $2.40 ÷ 2.5 = $0.96 per 100 g
- The cheaper unit price is better value.
8.Which is better value: pasta at $3.05 for 500 g, or at $4.90 for 1 kg?
Answer: $4.90 for 1 kg ($0.49 per 100 g)
- First: $3.05 ÷ 5 = $0.61 per 100 g
- Second: $4.90 ÷ 10 = $0.49 per 100 g
- The cheaper unit price is better value.
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.