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Year 10 Best Buys and Unit Prices Worksheet — Level 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 — Answers

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

1.Which is better value: oats at $2.50 for 1 kg, or at $0.75 for 500 g?

Answer: $0.75 for 500 g ($0.15 per 100 g)

  1. First: $2.50 ÷ 10 = $0.25 per 100 g
  2. Second: $0.75 ÷ 5 = $0.15 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: juice at $0.95 for 250 mL, or at $2.90 for 1 L?

Answer: $2.90 for 1 L ($0.29 per 100 mL)

  1. First: $0.95 ÷ 2.5 = $0.38 per 100 mL
  2. Second: $2.90 ÷ 10 = $0.29 per 100 mL
  3. The cheaper unit price is better value.
3.Which is better value: oats at $17.00 for 2 kg, or at $7.10 for 1 kg?

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

  1. First: $17.00 ÷ 20 = $0.85 per 100 g
  2. Second: $7.10 ÷ 10 = $0.71 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: oats at $6.40 for 1 kg, or at $2.75 for 500 g?

Answer: $2.75 for 500 g ($0.55 per 100 g)

  1. First: $6.40 ÷ 10 = $0.64 per 100 g
  2. Second: $2.75 ÷ 5 = $0.55 per 100 g
  3. The cheaper unit price is better value.
5.Which is better value: oats at $8.80 for 1 kg, or at $19.40 for 2 kg?

Answer: $8.80 for 1 kg ($0.88 per 100 g)

  1. First: $8.80 ÷ 10 = $0.88 per 100 g
  2. Second: $19.40 ÷ 20 = $0.97 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: rice at $8.20 for 2 kg, or at $1.95 for 500 g?

Answer: $1.95 for 500 g ($0.39 per 100 g)

  1. First: $8.20 ÷ 20 = $0.41 per 100 g
  2. Second: $1.95 ÷ 5 = $0.39 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $8.88 for a pack of 12, or at $20.16 for a pack of 24?

Answer: $8.88 for a pack of 12 ($0.74 per pencil)

  1. First: $8.88 ÷ 12 = $0.74 per pencil
  2. Second: $20.16 ÷ 24 = $0.84 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: juice at $9.80 for 2 L, or at $5.10 for 1 L?

Answer: $9.80 for 2 L ($0.49 per 100 mL)

  1. First: $9.80 ÷ 20 = $0.49 per 100 mL
  2. Second: $5.10 ÷ 10 = $0.51 per 100 mL
  3. The cheaper unit price is better value.
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