7th Grade Best Buys and Unit Prices Worksheet — Level 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 — 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 $10.20 for 2 kg, or at $6.60 for 1 kg?
Answer: $10.20 for 2 kg ($0.51 per 100 g)
- First: $10.20 ÷ 20 = $0.51 per 100 g
- Second: $6.60 ÷ 10 = $0.66 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pencils at $20.64 for a pack of 24, or at $8.40 for a pack of 12?
Answer: $8.40 for a pack of 12 ($0.70 per pencil)
- First: $20.64 ÷ 24 = $0.86 per pencil
- Second: $8.40 ÷ 12 = $0.70 per pencil
- The cheaper unit price is better value.
3.Which is better value: pasta at $2.70 for 1 kg, or at $1.80 for 500 g?
Answer: $2.70 for 1 kg ($0.27 per 100 g)
- First: $2.70 ÷ 10 = $0.27 per 100 g
- Second: $1.80 ÷ 5 = $0.36 per 100 g
- The cheaper unit price is better value.
4.Which is better value: oats at $8.60 for 1 kg, or at $4.55 for 500 g?
Answer: $8.60 for 1 kg ($0.86 per 100 g)
- First: $8.60 ÷ 10 = $0.86 per 100 g
- Second: $4.55 ÷ 5 = $0.91 per 100 g
- The cheaper unit price is better value.
5.Which is better value: oats at $3.70 for 500 g, or at $9.30 for 1 kg?
Answer: $3.70 for 500 g ($0.74 per 100 g)
- First: $3.70 ÷ 5 = $0.74 per 100 g
- Second: $9.30 ÷ 10 = $0.93 per 100 g
- The cheaper unit price is better value.
6.Which is better value: rice at $6.90 for 1 kg, or at $9.80 for 2 kg?
Answer: $9.80 for 2 kg ($0.49 per 100 g)
- First: $6.90 ÷ 10 = $0.69 per 100 g
- Second: $9.80 ÷ 20 = $0.49 per 100 g
- The cheaper unit price is better value.
7.Which is better value: rice at $1.55 for 500 g, or at $4.20 for 2 kg?
Answer: $4.20 for 2 kg ($0.21 per 100 g)
- First: $1.55 ÷ 5 = $0.31 per 100 g
- Second: $4.20 ÷ 20 = $0.21 per 100 g
- The cheaper unit price is better value.
8.Which is better value: pasta at $1.35 for 500 g, or at $4.70 for 1 kg?
Answer: $1.35 for 500 g ($0.27 per 100 g)
- First: $1.35 ÷ 5 = $0.27 per 100 g
- Second: $4.70 ÷ 10 = $0.47 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.