Year 7 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 4 — 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 4 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your working.
1.Which is better value: pasta at $8.40 for 1 kg, or at $3.90 for 500 g?
Answer: $3.90 for 500 g ($0.78 per 100 g)
- First: $8.40 ÷ 10 = $0.84 per 100 g
- Second: $3.90 ÷ 5 = $0.78 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pasta at $2.35 for 500 g, or at $1.00 for 250 g?
Answer: $1.00 for 250 g ($0.40 per 100 g)
- First: $2.35 ÷ 5 = $0.47 per 100 g
- Second: $1.00 ÷ 2.5 = $0.40 per 100 g
- The cheaper unit price is better value.
3.Which is better value: pasta at $7.90 for 1 kg, or at $4.50 for 500 g?
Answer: $7.90 for 1 kg ($0.79 per 100 g)
- First: $7.90 ÷ 10 = $0.79 per 100 g
- Second: $4.50 ÷ 5 = $0.90 per 100 g
- The cheaper unit price is better value.
4.Which is better value: rice at $4.15 for 500 g, or at $7.40 for 1 kg?
Answer: $7.40 for 1 kg ($0.74 per 100 g)
- First: $4.15 ÷ 5 = $0.83 per 100 g
- Second: $7.40 ÷ 10 = $0.74 per 100 g
- The cheaper unit price is better value.
5.Which is better value: pencils at $4.32 for a pack of 24, or at $4.20 for a pack of 12?
Answer: $4.32 for a pack of 24 ($0.18 per pencil)
- First: $4.32 ÷ 24 = $0.18 per pencil
- Second: $4.20 ÷ 12 = $0.35 per pencil
- The cheaper unit price is better value.
6.Which is better value: pencils at $14.64 for a pack of 24, or at $9.60 for a pack of 12?
Answer: $14.64 for a pack of 24 ($0.61 per pencil)
- First: $14.64 ÷ 24 = $0.61 per pencil
- Second: $9.60 ÷ 12 = $0.80 per pencil
- The cheaper unit price is better value.
7.Which is better value: pencils at $4.74 for a pack of 6, or at $10.44 for a pack of 12?
Answer: $4.74 for a pack of 6 ($0.79 per pencil)
- First: $4.74 ÷ 6 = $0.79 per pencil
- Second: $10.44 ÷ 12 = $0.87 per pencil
- The cheaper unit price is better value.
8.Which is better value: juice at $3.60 for 1 L, or at $8.60 for 2 L?
Answer: $3.60 for 1 L ($0.36 per 100 mL)
- First: $3.60 ÷ 10 = $0.36 per 100 mL
- Second: $8.60 ÷ 20 = $0.43 per 100 mL
- 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.