Year 10 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 4 — 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 4 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your working.
1.Which is better value: rice at $3.70 for 1 kg, or at $1.45 for 500 g?
Answer: $1.45 for 500 g ($0.29 per 100 g)
- First: $3.70 ÷ 10 = $0.37 per 100 g
- Second: $1.45 ÷ 5 = $0.29 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pencils at $1.80 for a pack of 6, or at $5.28 for a pack of 12?
Answer: $1.80 for a pack of 6 ($0.30 per pencil)
- First: $1.80 ÷ 6 = $0.30 per pencil
- Second: $5.28 ÷ 12 = $0.44 per pencil
- The cheaper unit price is better value.
3.Which is better value: rice at $3.70 for 500 g, or at $16.80 for 2 kg?
Answer: $3.70 for 500 g ($0.74 per 100 g)
- First: $3.70 ÷ 5 = $0.74 per 100 g
- Second: $16.80 ÷ 20 = $0.84 per 100 g
- The cheaper unit price is better value.
4.Which is better value: pencils at $8.40 for a pack of 12, or at $5.04 for a pack of 6?
Answer: $8.40 for a pack of 12 ($0.70 per pencil)
- First: $8.40 ÷ 12 = $0.70 per pencil
- Second: $5.04 ÷ 6 = $0.84 per pencil
- The cheaper unit price is better value.
5.Which is better value: rice at $2.35 for 500 g, or at $3.30 for 1 kg?
Answer: $3.30 for 1 kg ($0.33 per 100 g)
- First: $2.35 ÷ 5 = $0.47 per 100 g
- Second: $3.30 ÷ 10 = $0.33 per 100 g
- The cheaper unit price is better value.
6.Which is better value: pencils at $7.92 for a pack of 24, or at $1.68 for a pack of 12?
Answer: $1.68 for a pack of 12 ($0.14 per pencil)
- First: $7.92 ÷ 24 = $0.33 per pencil
- Second: $1.68 ÷ 12 = $0.14 per pencil
- The cheaper unit price is better value.
7.Which is better value: pasta at $4.05 for 500 g, or at $9.10 for 1 kg?
Answer: $4.05 for 500 g ($0.81 per 100 g)
- First: $4.05 ÷ 5 = $0.81 per 100 g
- Second: $9.10 ÷ 10 = $0.91 per 100 g
- The cheaper unit price is better value.
8.Which is better value: oats at $2.20 for 1 kg, or at $1.45 for 500 g?
Answer: $2.20 for 1 kg ($0.22 per 100 g)
- First: $2.20 ÷ 10 = $0.22 per 100 g
- Second: $1.45 ÷ 5 = $0.29 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.