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Year 8 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 4 — Answers

Answer sheet with worked solutions for the Year 8 ratio & rates worksheet.

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Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Ratio & Rates

Year 8 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: rice at $4.60 for 2 kg, or at $2.00 for 1 kg?

Answer: $2.00 for 1 kg ($0.20 per 100 g)

  1. First: $4.60 ÷ 20 = $0.23 per 100 g
  2. Second: $2.00 ÷ 10 = $0.20 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: oats at $2.40 for 1 kg, or at $1.30 for 500 g?

Answer: $2.40 for 1 kg ($0.24 per 100 g)

  1. First: $2.40 ÷ 10 = $0.24 per 100 g
  2. Second: $1.30 ÷ 5 = $0.26 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: juice at $3.40 for 2 L, or at $1.90 for 1 L?

Answer: $3.40 for 2 L ($0.17 per 100 mL)

  1. First: $3.40 ÷ 20 = $0.17 per 100 mL
  2. Second: $1.90 ÷ 10 = $0.19 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: rice at $2.05 for 500 g, or at $3.90 for 1 kg?

Answer: $3.90 for 1 kg ($0.39 per 100 g)

  1. First: $2.05 ÷ 5 = $0.41 per 100 g
  2. Second: $3.90 ÷ 10 = $0.39 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: juice at $7.60 for 2 L, or at $2.20 for 1 L?

Answer: $2.20 for 1 L ($0.22 per 100 mL)

  1. First: $7.60 ÷ 20 = $0.38 per 100 mL
  2. Second: $2.20 ÷ 10 = $0.22 per 100 mL
  3. The cheaper unit price is better value.
6.Which is better value: pencils at $3.00 for a pack of 6, or at $5.64 for a pack of 12?

Answer: $5.64 for a pack of 12 ($0.47 per pencil)

  1. First: $3.00 ÷ 6 = $0.50 per pencil
  2. Second: $5.64 ÷ 12 = $0.47 per pencil
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $7.44 for a pack of 12, or at $18.00 for a pack of 24?

Answer: $7.44 for a pack of 12 ($0.62 per pencil)

  1. First: $7.44 ÷ 12 = $0.62 per pencil
  2. Second: $18.00 ÷ 24 = $0.75 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: pasta at $5.00 for 1 kg, or at $1.45 for 250 g?

Answer: $5.00 for 1 kg ($0.50 per 100 g)

  1. First: $5.00 ÷ 10 = $0.50 per 100 g
  2. Second: $1.45 ÷ 2.5 = $0.58 per 100 g
  3. The cheaper unit price is better value.
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