Success TutoringWorksheets

Year 8 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 2 — Answers

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

Download answers PDFPrint answersBack to worksheet
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Ratio & Rates

Year 8 Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 2 — 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 $5.00 for 2 L, or at $1.10 for 1 L?

Answer: $1.10 for 1 L ($0.11 per 100 mL)

  1. First: $5.00 ÷ 20 = $0.25 per 100 mL
  2. Second: $1.10 ÷ 10 = $0.11 per 100 mL
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $2.40 for a pack of 6, or at $3.12 for a pack of 12?

Answer: $3.12 for a pack of 12 ($0.26 per pencil)

  1. First: $2.40 ÷ 6 = $0.40 per pencil
  2. Second: $3.12 ÷ 12 = $0.26 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: rice at $3.80 for 1 kg, or at $2.35 for 500 g?

Answer: $3.80 for 1 kg ($0.38 per 100 g)

  1. First: $3.80 ÷ 10 = $0.38 per 100 g
  2. Second: $2.35 ÷ 5 = $0.47 per 100 g
  3. The cheaper unit price is better value.
4.Which is better value: juice at $1.60 for 1 L, or at $5.20 for 2 L?

Answer: $1.60 for 1 L ($0.16 per 100 mL)

  1. First: $1.60 ÷ 10 = $0.16 per 100 mL
  2. Second: $5.20 ÷ 20 = $0.26 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: rice at $2.20 for 1 kg, or at $5.80 for 2 kg?

Answer: $2.20 for 1 kg ($0.22 per 100 g)

  1. First: $2.20 ÷ 10 = $0.22 per 100 g
  2. Second: $5.80 ÷ 20 = $0.29 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $3.80 for 2 kg, or at $3.40 for 1 kg?

Answer: $3.80 for 2 kg ($0.19 per 100 g)

  1. First: $3.80 ÷ 20 = $0.19 per 100 g
  2. Second: $3.40 ÷ 10 = $0.34 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: pencils at $5.34 for a pack of 6, or at $11.64 for a pack of 12?

Answer: $5.34 for a pack of 6 ($0.89 per pencil)

  1. First: $5.34 ÷ 6 = $0.89 per pencil
  2. Second: $11.64 ÷ 12 = $0.97 per pencil
  3. The cheaper unit price is better value.
8.Which is better value: juice at $5.20 for 2 L, or at $0.80 for 1 L?

Answer: $0.80 for 1 L ($0.08 per 100 mL)

  1. First: $5.20 ÷ 20 = $0.26 per 100 mL
  2. Second: $0.80 ÷ 10 = $0.08 per 100 mL
  3. The cheaper unit price is better value.
Free worksheets at worksheets.successtutoring.com · © Success Tutoring · Free for personal and classroom use

Marking tips

  • Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
  • For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
  • Celebrate what went well first, then pick one thing to work on next.

Great work. Here's what to try next: