9th Grade Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 9th Grade ratios & rates worksheet.
Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Ratio & Rates9th Grade Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 4 — 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 $11.80 for 2 kg, or at $2.60 for 500 g?
Answer: $2.60 for 500 g ($0.52 per 100 g)
- First: $11.80 ÷ 20 = $0.59 per 100 g
- Second: $2.60 ÷ 5 = $0.52 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pasta at $8.90 for 1 kg, or at $5.40 for 500 g?
Answer: $8.90 for 1 kg ($0.89 per 100 g)
- First: $8.90 ÷ 10 = $0.89 per 100 g
- Second: $5.40 ÷ 5 = $1.08 per 100 g
- The cheaper unit price is better value.
3.Which is better value: rice at $2.20 for 1 kg, or at $0.45 for 500 g?
Answer: $0.45 for 500 g ($0.09 per 100 g)
- First: $2.20 ÷ 10 = $0.22 per 100 g
- Second: $0.45 ÷ 5 = $0.09 per 100 g
- The cheaper unit price is better value.
4.Which is better value: oats at $4.30 for 1 kg, or at $7.60 for 2 kg?
Answer: $7.60 for 2 kg ($0.38 per 100 g)
- First: $4.30 ÷ 10 = $0.43 per 100 g
- Second: $7.60 ÷ 20 = $0.38 per 100 g
- The cheaper unit price is better value.
5.Which is better value: pasta at $2.05 for 250 g, or at $3.60 for 500 g?
Answer: $3.60 for 500 g ($0.72 per 100 g)
- First: $2.05 ÷ 2.5 = $0.82 per 100 g
- Second: $3.60 ÷ 5 = $0.72 per 100 g
- The cheaper unit price is better value.
6.Which is better value: juice at $1.85 for 250 mL, or at $17.60 for 2 L?
Answer: $1.85 for 250 mL ($0.74 per 100 mL)
- First: $1.85 ÷ 2.5 = $0.74 per 100 mL
- Second: $17.60 ÷ 20 = $0.88 per 100 mL
- The cheaper unit price is better value.
7.Which is better value: pasta at $1.95 for 500 g, or at $2.50 for 1 kg?
Answer: $2.50 for 1 kg ($0.25 per 100 g)
- First: $1.95 ÷ 5 = $0.39 per 100 g
- Second: $2.50 ÷ 10 = $0.25 per 100 g
- The cheaper unit price is better value.
8.Which is better value: pasta at $1.55 for 500 g, or at $1.40 for 1 kg?
Answer: $1.40 for 1 kg ($0.14 per 100 g)
- First: $1.55 ÷ 5 = $0.31 per 100 g
- Second: $1.40 ÷ 10 = $0.14 per 100 g
- The cheaper unit price is better value.
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.