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Year 10 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 4 — 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 4 — Answers

Find the price for the same amount of each (the unit price), then compare. Show your working.

1.Which is better value: juice at $4.80 for 1 L, or at $10.60 for 2 L?

Answer: $4.80 for 1 L ($0.48 per 100 mL)

  1. First: $4.80 ÷ 10 = $0.48 per 100 mL
  2. Second: $10.60 ÷ 20 = $0.53 per 100 mL
  3. The cheaper unit price is better value.
2.Which is better value: oats at $7.60 for 2 kg, or at $5.10 for 1 kg?

Answer: $7.60 for 2 kg ($0.38 per 100 g)

  1. First: $7.60 ÷ 20 = $0.38 per 100 g
  2. Second: $5.10 ÷ 10 = $0.51 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: pencils at $3.78 for a pack of 6, or at $18.48 for a pack of 24?

Answer: $3.78 for a pack of 6 ($0.63 per pencil)

  1. First: $3.78 ÷ 6 = $0.63 per pencil
  2. Second: $18.48 ÷ 24 = $0.77 per pencil
  3. The cheaper unit price is better value.
4.Which is better value: juice at $7.00 for 1 L, or at $13.60 for 2 L?

Answer: $13.60 for 2 L ($0.68 per 100 mL)

  1. First: $7.00 ÷ 10 = $0.70 per 100 mL
  2. Second: $13.60 ÷ 20 = $0.68 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: rice at $1.25 for 500 g, or at $1.70 for 1 kg?

Answer: $1.70 for 1 kg ($0.17 per 100 g)

  1. First: $1.25 ÷ 5 = $0.25 per 100 g
  2. Second: $1.70 ÷ 10 = $0.17 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $3.65 for 500 g, or at $7.10 for 1 kg?

Answer: $7.10 for 1 kg ($0.71 per 100 g)

  1. First: $3.65 ÷ 5 = $0.73 per 100 g
  2. Second: $7.10 ÷ 10 = $0.71 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: juice at $12.60 for 2 L, or at $5.40 for 1 L?

Answer: $5.40 for 1 L ($0.54 per 100 mL)

  1. First: $12.60 ÷ 20 = $0.63 per 100 mL
  2. Second: $5.40 ÷ 10 = $0.54 per 100 mL
  3. The cheaper unit price is better value.
8.Which is better value: pasta at $2.90 for 500 g, or at $1.80 for 250 g?

Answer: $2.90 for 500 g ($0.58 per 100 g)

  1. First: $2.90 ÷ 5 = $0.58 per 100 g
  2. Second: $1.80 ÷ 2.5 = $0.72 per 100 g
  3. The cheaper unit price is better value.
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