Success TutoringWorksheets

Year 8 Best Buys and Unit Prices Worksheet — Level 3 — 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 — 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 $1.65 for 500 g, or at $7.00 for 2 kg?

Answer: $1.65 for 500 g ($0.33 per 100 g)

  1. First: $1.65 ÷ 5 = $0.33 per 100 g
  2. Second: $7.00 ÷ 20 = $0.35 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: pencils at $5.16 for a pack of 6, or at $11.40 for a pack of 12?

Answer: $5.16 for a pack of 6 ($0.86 per pencil)

  1. First: $5.16 ÷ 6 = $0.86 per pencil
  2. Second: $11.40 ÷ 12 = $0.95 per pencil
  3. The cheaper unit price is better value.
3.Which is better value: juice at $0.80 for 250 mL, or at $4.20 for 2 L?

Answer: $4.20 for 2 L ($0.21 per 100 mL)

  1. First: $0.80 ÷ 2.5 = $0.32 per 100 mL
  2. Second: $4.20 ÷ 20 = $0.21 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: juice at $0.40 for 250 mL, or at $2.30 for 1 L?

Answer: $0.40 for 250 mL ($0.16 per 100 mL)

  1. First: $0.40 ÷ 2.5 = $0.16 per 100 mL
  2. Second: $2.30 ÷ 10 = $0.23 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: pasta at $5.00 for 1 kg, or at $1.60 for 500 g?

Answer: $1.60 for 500 g ($0.32 per 100 g)

  1. First: $5.00 ÷ 10 = $0.50 per 100 g
  2. Second: $1.60 ÷ 5 = $0.32 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $2.25 for 500 g, or at $2.90 for 1 kg?

Answer: $2.90 for 1 kg ($0.29 per 100 g)

  1. First: $2.25 ÷ 5 = $0.45 per 100 g
  2. Second: $2.90 ÷ 10 = $0.29 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: rice at $1.30 for 500 g, or at $7.20 for 2 kg?

Answer: $1.30 for 500 g ($0.26 per 100 g)

  1. First: $1.30 ÷ 5 = $0.26 per 100 g
  2. Second: $7.20 ÷ 20 = $0.36 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pencils at $5.52 for a pack of 12, or at $14.40 for a pack of 24?

Answer: $5.52 for a pack of 12 ($0.46 per pencil)

  1. First: $5.52 ÷ 12 = $0.46 per pencil
  2. Second: $14.40 ÷ 24 = $0.60 per pencil
  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: