Year 9 Best Buys and Unit Prices Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the Year 9 ratio & rates worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · Ratio & RatesYear 9 Best Buys and Unit Prices Worksheet — Level 2 — 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 $15.84 for a pack of 24, or at $6.24 for a pack of 12?
Answer: $6.24 for a pack of 12 ($0.52 per pencil)
- First: $15.84 ÷ 24 = $0.66 per pencil
- Second: $6.24 ÷ 12 = $0.52 per pencil
- The cheaper unit price is better value.
2.Which is better value: pencils at $9.84 for a pack of 24, or at $3.36 for a pack of 6?
Answer: $9.84 for a pack of 24 ($0.41 per pencil)
- First: $9.84 ÷ 24 = $0.41 per pencil
- Second: $3.36 ÷ 6 = $0.56 per pencil
- The cheaper unit price is better value.
3.Which is better value: rice at $4.40 for 500 g, or at $9.80 for 1 kg?
Answer: $4.40 for 500 g ($0.88 per 100 g)
- First: $4.40 ÷ 5 = $0.88 per 100 g
- Second: $9.80 ÷ 10 = $0.98 per 100 g
- The cheaper unit price is better value.
4.Which is better value: pasta at $0.45 for 250 g, or at $0.35 for 500 g?
Answer: $0.35 for 500 g ($0.07 per 100 g)
- First: $0.45 ÷ 2.5 = $0.18 per 100 g
- Second: $0.35 ÷ 5 = $0.07 per 100 g
- The cheaper unit price is better value.
5.Which is better value: oats at $2.25 for 500 g, or at $7.00 for 2 kg?
Answer: $7.00 for 2 kg ($0.35 per 100 g)
- First: $2.25 ÷ 5 = $0.45 per 100 g
- Second: $7.00 ÷ 20 = $0.35 per 100 g
- The cheaper unit price is better value.
6.Which is better value: rice at $8.00 for 1 kg, or at $3.25 for 500 g?
Answer: $3.25 for 500 g ($0.65 per 100 g)
- First: $8.00 ÷ 10 = $0.80 per 100 g
- Second: $3.25 ÷ 5 = $0.65 per 100 g
- The cheaper unit price is better value.
7.Which is better value: rice at $5.90 for 1 kg, or at $3.50 for 500 g?
Answer: $5.90 for 1 kg ($0.59 per 100 g)
- First: $5.90 ÷ 10 = $0.59 per 100 g
- Second: $3.50 ÷ 5 = $0.70 per 100 g
- The cheaper unit price is better value.
8.Which is better value: oats at $6.40 for 1 kg, or at $11.80 for 2 kg?
Answer: $11.80 for 2 kg ($0.59 per 100 g)
- First: $6.40 ÷ 10 = $0.64 per 100 g
- Second: $11.80 ÷ 20 = $0.59 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.
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