7th Grade Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 2 — 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 2 — Practice Set 2 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your work.
1.Which is better value: pasta at $3.75 for 500 g, or at $9.00 for 1 kg?
Answer: $3.75 for 500 g ($0.75 per 100 g)
- First: $3.75 ÷ 5 = $0.75 per 100 g
- Second: $9.00 ÷ 10 = $0.90 per 100 g
- The cheaper unit price is better value.
2.Which is better value: rice at $1.85 for 500 g, or at $4.30 for 1 kg?
Answer: $1.85 for 500 g ($0.37 per 100 g)
- First: $1.85 ÷ 5 = $0.37 per 100 g
- Second: $4.30 ÷ 10 = $0.43 per 100 g
- The cheaper unit price is better value.
3.Which is better value: juice at $2.30 for 1 L, or at $0.15 for 250 mL?
Answer: $0.15 for 250 mL ($0.06 per 100 mL)
- First: $2.30 ÷ 10 = $0.23 per 100 mL
- Second: $0.15 ÷ 2.5 = $0.06 per 100 mL
- The cheaper unit price is better value.
4.Which is better value: pencils at $9.36 for a pack of 24, or at $2.04 for a pack of 6?
Answer: $2.04 for a pack of 6 ($0.34 per pencil)
- First: $9.36 ÷ 24 = $0.39 per pencil
- Second: $2.04 ÷ 6 = $0.34 per pencil
- The cheaper unit price is better value.
5.Which is better value: pasta at $3.10 for 1 kg, or at $0.95 for 500 g?
Answer: $0.95 for 500 g ($0.19 per 100 g)
- First: $3.10 ÷ 10 = $0.31 per 100 g
- Second: $0.95 ÷ 5 = $0.19 per 100 g
- The cheaper unit price is better value.
6.Which is better value: pencils at $6.00 for a pack of 12, or at $16.32 for a pack of 24?
Answer: $6.00 for a pack of 12 ($0.50 per pencil)
- First: $6.00 ÷ 12 = $0.50 per pencil
- Second: $16.32 ÷ 24 = $0.68 per pencil
- The cheaper unit price is better value.
7.Which is better value: oats at $2.50 for 1 kg, or at $1.80 for 500 g?
Answer: $2.50 for 1 kg ($0.25 per 100 g)
- First: $2.50 ÷ 10 = $0.25 per 100 g
- Second: $1.80 ÷ 5 = $0.36 per 100 g
- The cheaper unit price is better value.
8.Which is better value: pencils at $2.46 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)
- First: $2.46 ÷ 6 = $0.41 per pencil
- Second: $3.12 ÷ 12 = $0.26 per pencil
- 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.