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Year 10 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 3 — 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 3 — 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 $3.60 for 1 L, or at $10.20 for 2 L?

Answer: $3.60 for 1 L ($0.36 per 100 mL)

  1. First: $3.60 ÷ 10 = $0.36 per 100 mL
  2. Second: $10.20 ÷ 20 = $0.51 per 100 mL
  3. The cheaper unit price is better value.
2.Which is better value: rice at $3.40 for 500 g, or at $16.00 for 2 kg?

Answer: $3.40 for 500 g ($0.68 per 100 g)

  1. First: $3.40 ÷ 5 = $0.68 per 100 g
  2. Second: $16.00 ÷ 20 = $0.80 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: rice at $6.60 for 2 kg, or at $1.00 for 500 g?

Answer: $1.00 for 500 g ($0.20 per 100 g)

  1. First: $6.60 ÷ 20 = $0.33 per 100 g
  2. Second: $1.00 ÷ 5 = $0.20 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $3.10 for 500 g, or at $15.20 for 2 kg?

Answer: $3.10 for 500 g ($0.62 per 100 g)

  1. First: $3.10 ÷ 5 = $0.62 per 100 g
  2. Second: $15.20 ÷ 20 = $0.76 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: rice at $1.80 for 1 kg, or at $1.40 for 500 g?

Answer: $1.80 for 1 kg ($0.18 per 100 g)

  1. First: $1.80 ÷ 10 = $0.18 per 100 g
  2. Second: $1.40 ÷ 5 = $0.28 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: pasta at $4.30 for 500 g, or at $6.60 for 1 kg?

Answer: $6.60 for 1 kg ($0.66 per 100 g)

  1. First: $4.30 ÷ 5 = $0.86 per 100 g
  2. Second: $6.60 ÷ 10 = $0.66 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $4.86 for a pack of 6, or at $8.76 for a pack of 12?

Answer: $8.76 for a pack of 12 ($0.73 per pencil)

  1. First: $4.86 ÷ 6 = $0.81 per pencil
  2. Second: $8.76 ÷ 12 = $0.73 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: juice at $7.80 for 1 L, or at $2.05 for 250 mL?

Answer: $7.80 for 1 L ($0.78 per 100 mL)

  1. First: $7.80 ÷ 10 = $0.78 per 100 mL
  2. Second: $2.05 ÷ 2.5 = $0.82 per 100 mL
  3. The cheaper unit price is better value.
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