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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: pencils at $8.04 for a pack of 12, or at $4.44 for a pack of 6?

Answer: $8.04 for a pack of 12 ($0.67 per pencil)

  1. First: $8.04 ÷ 12 = $0.67 per pencil
  2. Second: $4.44 ÷ 6 = $0.74 per pencil
  3. The cheaper unit price is better value.
2.Which is better value: rice at $18.00 for 2 kg, or at $9.20 for 1 kg?

Answer: $18.00 for 2 kg ($0.90 per 100 g)

  1. First: $18.00 ÷ 20 = $0.90 per 100 g
  2. Second: $9.20 ÷ 10 = $0.92 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: rice at $5.70 for 1 kg, or at $2.05 for 500 g?

Answer: $2.05 for 500 g ($0.41 per 100 g)

  1. First: $5.70 ÷ 10 = $0.57 per 100 g
  2. Second: $2.05 ÷ 5 = $0.41 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: pencils at $19.44 for a pack of 24, or at $11.76 for a pack of 12?

Answer: $19.44 for a pack of 24 ($0.81 per pencil)

  1. First: $19.44 ÷ 24 = $0.81 per pencil
  2. Second: $11.76 ÷ 12 = $0.98 per pencil
  3. The cheaper unit price is better value.
5.Which is better value: rice at $16.00 for 2 kg, or at $3.65 for 500 g?

Answer: $3.65 for 500 g ($0.73 per 100 g)

  1. First: $16.00 ÷ 20 = $0.80 per 100 g
  2. Second: $3.65 ÷ 5 = $0.73 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $1.50 for 500 g, or at $8.00 for 2 kg?

Answer: $1.50 for 500 g ($0.30 per 100 g)

  1. First: $1.50 ÷ 5 = $0.30 per 100 g
  2. Second: $8.00 ÷ 20 = $0.40 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: rice at $9.60 for 2 kg, or at $4.40 for 1 kg?

Answer: $4.40 for 1 kg ($0.44 per 100 g)

  1. First: $9.60 ÷ 20 = $0.48 per 100 g
  2. Second: $4.40 ÷ 10 = $0.44 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: rice at $6.90 for 1 kg, or at $17.00 for 2 kg?

Answer: $6.90 for 1 kg ($0.69 per 100 g)

  1. First: $6.90 ÷ 10 = $0.69 per 100 g
  2. Second: $17.00 ÷ 20 = $0.85 per 100 g
  3. The cheaper unit price is better value.
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