Year 10 Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — 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 3 — 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 $4.60 for 2 kg, or at $1.60 for 500 g?
Answer: $4.60 for 2 kg ($0.23 per 100 g)
- First: $4.60 ÷ 20 = $0.23 per 100 g
- Second: $1.60 ÷ 5 = $0.32 per 100 g
- The cheaper unit price is better value.
2.Which is better value: oats at $2.20 for 500 g, or at $5.40 for 1 kg?
Answer: $2.20 for 500 g ($0.44 per 100 g)
- First: $2.20 ÷ 5 = $0.44 per 100 g
- Second: $5.40 ÷ 10 = $0.54 per 100 g
- The cheaper unit price is better value.
3.Which is better value: juice at $11.60 for 2 L, or at $5.20 for 1 L?
Answer: $5.20 for 1 L ($0.52 per 100 mL)
- First: $11.60 ÷ 20 = $0.58 per 100 mL
- Second: $5.20 ÷ 10 = $0.52 per 100 mL
- The cheaper unit price is better value.
4.Which is better value: pencils at $9.12 for a pack of 12, or at $3.90 for a pack of 6?
Answer: $3.90 for a pack of 6 ($0.65 per pencil)
- First: $9.12 ÷ 12 = $0.76 per pencil
- Second: $3.90 ÷ 6 = $0.65 per pencil
- The cheaper unit price is better value.
5.Which is better value: juice at $7.00 for 2 L, or at $1.00 for 250 mL?
Answer: $7.00 for 2 L ($0.35 per 100 mL)
- First: $7.00 ÷ 20 = $0.35 per 100 mL
- Second: $1.00 ÷ 2.5 = $0.40 per 100 mL
- The cheaper unit price is better value.
6.Which is better value: pencils at $7.68 for a pack of 24, or at $4.68 for a pack of 12?
Answer: $7.68 for a pack of 24 ($0.32 per pencil)
- First: $7.68 ÷ 24 = $0.32 per pencil
- Second: $4.68 ÷ 12 = $0.39 per pencil
- The cheaper unit price is better value.
7.Which is better value: pasta at $2.45 for 500 g, or at $0.85 for 250 g?
Answer: $0.85 for 250 g ($0.34 per 100 g)
- First: $2.45 ÷ 5 = $0.49 per 100 g
- Second: $0.85 ÷ 2.5 = $0.34 per 100 g
- The cheaper unit price is better value.
8.Which is better value: juice at $6.00 for 1 L, or at $1.15 for 250 mL?
Answer: $1.15 for 250 mL ($0.46 per 100 mL)
- First: $6.00 ÷ 10 = $0.60 per 100 mL
- Second: $1.15 ÷ 2.5 = $0.46 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.