Success TutoringWorksheets

9th Grade Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 3 — Answers

Answer sheet with worked solutions for the 9th Grade ratios & rates worksheet.

Download answers PDFPrint answersBack to worksheet
Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Ratio & Rates

9th Grade Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 3 — Answers

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

1.Which is better value: rice at $7.50 for 1 kg, or at $2.85 for 500 g?

Answer: $2.85 for 500 g ($0.57 per 100 g)

  1. First: $7.50 ÷ 10 = $0.75 per 100 g
  2. Second: $2.85 ÷ 5 = $0.57 per 100 g
  3. The cheaper unit price is better value.
2.Which is better value: oats at $8.40 for 1 kg, or at $16.00 for 2 kg?

Answer: $16.00 for 2 kg ($0.80 per 100 g)

  1. First: $8.40 ÷ 10 = $0.84 per 100 g
  2. Second: $16.00 ÷ 20 = $0.80 per 100 g
  3. The cheaper unit price is better value.
3.Which is better value: juice at $7.80 for 2 L, or at $2.30 for 1 L?

Answer: $2.30 for 1 L ($0.23 per 100 mL)

  1. First: $7.80 ÷ 20 = $0.39 per 100 mL
  2. Second: $2.30 ÷ 10 = $0.23 per 100 mL
  3. The cheaper unit price is better value.
4.Which is better value: juice at $0.65 for 250 mL, or at $7.20 for 2 L?

Answer: $0.65 for 250 mL ($0.26 per 100 mL)

  1. First: $0.65 ÷ 2.5 = $0.26 per 100 mL
  2. Second: $7.20 ÷ 20 = $0.36 per 100 mL
  3. The cheaper unit price is better value.
5.Which is better value: oats at $3.85 for 500 g, or at $6.90 for 1 kg?

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

  1. First: $3.85 ÷ 5 = $0.77 per 100 g
  2. Second: $6.90 ÷ 10 = $0.69 per 100 g
  3. The cheaper unit price is better value.
6.Which is better value: oats at $13.00 for 2 kg, or at $3.45 for 500 g?

Answer: $13.00 for 2 kg ($0.65 per 100 g)

  1. First: $13.00 ÷ 20 = $0.65 per 100 g
  2. Second: $3.45 ÷ 5 = $0.69 per 100 g
  3. The cheaper unit price is better value.
7.Which is better value: rice at $4.00 for 500 g, or at $12.00 for 2 kg?

Answer: $12.00 for 2 kg ($0.60 per 100 g)

  1. First: $4.00 ÷ 5 = $0.80 per 100 g
  2. Second: $12.00 ÷ 20 = $0.60 per 100 g
  3. The cheaper unit price is better value.
8.Which is better value: pasta at $1.55 for 250 g, or at $2.95 for 500 g?

Answer: $2.95 for 500 g ($0.59 per 100 g)

  1. First: $1.55 ÷ 2.5 = $0.62 per 100 g
  2. Second: $2.95 ÷ 5 = $0.59 per 100 g
  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: