7th Grade Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 7th Grade ratios & rates worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Ratio & Rates7th Grade 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 work.
1.Which is better value: oats at $15.00 for 2 kg, or at $3.85 for 500 g?
Answer: $15.00 for 2 kg ($0.75 per 100 g)
- First: $15.00 ÷ 20 = $0.75 per 100 g
- Second: $3.85 ÷ 5 = $0.77 per 100 g
- The cheaper unit price is better value.
2.Which is better value: rice at $2.60 for 1 kg, or at $2.15 for 500 g?
Answer: $2.60 for 1 kg ($0.26 per 100 g)
- First: $2.60 ÷ 10 = $0.26 per 100 g
- Second: $2.15 ÷ 5 = $0.43 per 100 g
- The cheaper unit price is better value.
3.Which is better value: rice at $3.50 for 1 kg, or at $2.75 for 500 g?
Answer: $3.50 for 1 kg ($0.35 per 100 g)
- First: $3.50 ÷ 10 = $0.35 per 100 g
- Second: $2.75 ÷ 5 = $0.55 per 100 g
- The cheaper unit price is better value.
4.Which is better value: oats at $5.80 for 2 kg, or at $2.40 for 500 g?
Answer: $5.80 for 2 kg ($0.29 per 100 g)
- First: $5.80 ÷ 20 = $0.29 per 100 g
- Second: $2.40 ÷ 5 = $0.48 per 100 g
- The cheaper unit price is better value.
5.Which is better value: rice at $6.00 for 2 kg, or at $4.90 for 1 kg?
Answer: $6.00 for 2 kg ($0.30 per 100 g)
- First: $6.00 ÷ 20 = $0.30 per 100 g
- Second: $4.90 ÷ 10 = $0.49 per 100 g
- The cheaper unit price is better value.
6.Which is better value: oats at $6.10 for 1 kg, or at $10.60 for 2 kg?
Answer: $10.60 for 2 kg ($0.53 per 100 g)
- First: $6.10 ÷ 10 = $0.61 per 100 g
- Second: $10.60 ÷ 20 = $0.53 per 100 g
- The cheaper unit price is better value.
7.Which is better value: pasta at $7.60 for 1 kg, or at $4.50 for 500 g?
Answer: $7.60 for 1 kg ($0.76 per 100 g)
- First: $7.60 ÷ 10 = $0.76 per 100 g
- Second: $4.50 ÷ 5 = $0.90 per 100 g
- The cheaper unit price is better value.
8.Which is better value: pasta at $4.60 for 1 kg, or at $1.05 for 250 g?
Answer: $1.05 for 250 g ($0.42 per 100 g)
- First: $4.60 ÷ 10 = $0.46 per 100 g
- Second: $1.05 ÷ 2.5 = $0.42 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.