Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 7 ratio & rates worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Ratio & RatesYear 7 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your working.
1.Which is better value: pencils at $3.96 for a pack of 12, or at $6.24 for a pack of 24?
Answer: $6.24 for a pack of 24 ($0.26 per pencil)
- First: $3.96 ÷ 12 = $0.33 per pencil
- Second: $6.24 ÷ 24 = $0.26 per pencil
- The cheaper unit price is better value.
2.Which is better value: pencils at $4.86 for a pack of 6, or at $22.80 for a pack of 24?
Answer: $4.86 for a pack of 6 ($0.81 per pencil)
- First: $4.86 ÷ 6 = $0.81 per pencil
- Second: $22.80 ÷ 24 = $0.95 per pencil
- The cheaper unit price is better value.
3.Which is better value: rice at $0.95 for 500 g, or at $5.80 for 2 kg?
Answer: $0.95 for 500 g ($0.19 per 100 g)
- First: $0.95 ÷ 5 = $0.19 per 100 g
- Second: $5.80 ÷ 20 = $0.29 per 100 g
- The cheaper unit price is better value.
4.Which is better value: oats at $2.70 for 500 g, or at $14.60 for 2 kg?
Answer: $2.70 for 500 g ($0.54 per 100 g)
- First: $2.70 ÷ 5 = $0.54 per 100 g
- Second: $14.60 ÷ 20 = $0.73 per 100 g
- The cheaper unit price is better value.
5.Which is better value: oats at $3.15 for 500 g, or at $9.20 for 2 kg?
Answer: $9.20 for 2 kg ($0.46 per 100 g)
- First: $3.15 ÷ 5 = $0.63 per 100 g
- Second: $9.20 ÷ 20 = $0.46 per 100 g
- The cheaper unit price is better value.
6.Which is better value: pasta at $6.60 for 1 kg, or at $1.85 for 250 g?
Answer: $6.60 for 1 kg ($0.66 per 100 g)
- First: $6.60 ÷ 10 = $0.66 per 100 g
- Second: $1.85 ÷ 2.5 = $0.74 per 100 g
- The cheaper unit price is better value.
7.Which is better value: pasta at $3.80 for 500 g, or at $5.70 for 1 kg?
Answer: $5.70 for 1 kg ($0.57 per 100 g)
- First: $3.80 ÷ 5 = $0.76 per 100 g
- Second: $5.70 ÷ 10 = $0.57 per 100 g
- The cheaper unit price is better value.
8.Which is better value: oats at $1.75 for 500 g, or at $5.30 for 1 kg?
Answer: $1.75 for 500 g ($0.35 per 100 g)
- First: $1.75 ÷ 5 = $0.35 per 100 g
- Second: $5.30 ÷ 10 = $0.53 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.