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Year 10 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 2 — Answers

Answer sheet with worked solutions for the Year 10 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 10 · Mathematics · Ratio & Rates

Year 10 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 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 $2.28 for a pack of 6, or at $13.68 for a pack of 24?

Answer: $2.28 for a pack of 6 ($0.38 per pencil)

  1. First: $2.28 ÷ 6 = $0.38 per pencil
  2. Second: $13.68 ÷ 24 = $0.57 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: oats at $6.70 for 1 kg, or at $9.60 for 2 kg?

Answer: $9.60 for 2 kg ($0.48 per 100 g)

  1. First: $6.70 ÷ 10 = $0.67 per 100 g
  2. Second: $9.60 ÷ 20 = $0.48 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: pencils at $2.40 for a pack of 12, or at $4.08 for a pack of 24?

Answer: $4.08 for a pack of 24 ($0.17 per pencil)

  1. First: $2.40 ÷ 12 = $0.20 per pencil
  2. Second: $4.08 ÷ 24 = $0.17 per pencil
  3. The cheaper unit price is better value.
4.Which is better value: pasta at $1.80 for 250 g, or at $4.10 for 500 g?

Answer: $1.80 for 250 g ($0.72 per 100 g)

  1. First: $1.80 ÷ 2.5 = $0.72 per 100 g
  2. Second: $4.10 ÷ 5 = $0.82 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: pencils at $8.04 for a pack of 12, or at $11.28 for a pack of 24?

Answer: $11.28 for a pack of 24 ($0.47 per pencil)

  1. First: $8.04 ÷ 12 = $0.67 per pencil
  2. Second: $11.28 ÷ 24 = $0.47 per pencil
  3. The cheaper unit price is better value.
6.Which is better value: rice at $7.40 for 1 kg, or at $17.00 for 2 kg?

Answer: $7.40 for 1 kg ($0.74 per 100 g)

  1. First: $7.40 ÷ 10 = $0.74 per 100 g
  2. Second: $17.00 ÷ 20 = $0.85 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pasta at $2.05 for 250 g, or at $9.00 for 1 kg?

Answer: $2.05 for 250 g ($0.82 per 100 g)

  1. First: $2.05 ÷ 2.5 = $0.82 per 100 g
  2. Second: $9.00 ÷ 10 = $0.90 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $2.04 for a pack of 12, or at $1.86 for a pack of 6?

Answer: $2.04 for a pack of 12 ($0.17 per pencil)

  1. First: $2.04 ÷ 12 = $0.17 per pencil
  2. Second: $1.86 ÷ 6 = $0.31 per pencil
  3. The cheaper unit price is better value.
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