7th Grade Best Buys and Unit Prices Worksheet — Level 3 — Practice Set 3 — 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 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 $11.40 for 2 kg, or at $4.00 for 1 kg?
Answer: $4.00 for 1 kg ($0.40 per 100 g)
- First: $11.40 ÷ 20 = $0.57 per 100 g
- Second: $4.00 ÷ 10 = $0.40 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pencils at $1.86 for a pack of 6, or at $12.24 for a pack of 24?
Answer: $1.86 for a pack of 6 ($0.31 per pencil)
- First: $1.86 ÷ 6 = $0.31 per pencil
- Second: $12.24 ÷ 24 = $0.51 per pencil
- The cheaper unit price is better value.
3.Which is better value: pencils at $2.28 for a pack of 6, or at $6.00 for a pack of 24?
Answer: $6.00 for a pack of 24 ($0.25 per pencil)
- First: $2.28 ÷ 6 = $0.38 per pencil
- Second: $6.00 ÷ 24 = $0.25 per pencil
- The cheaper unit price is better value.
4.Which is better value: pencils at $20.40 for a pack of 24, or at $10.44 for a pack of 12?
Answer: $20.40 for a pack of 24 ($0.85 per pencil)
- First: $20.40 ÷ 24 = $0.85 per pencil
- Second: $10.44 ÷ 12 = $0.87 per pencil
- The cheaper unit price is better value.
5.Which is better value: rice at $4.00 for 500 g, or at $8.80 for 1 kg?
Answer: $4.00 for 500 g ($0.80 per 100 g)
- First: $4.00 ÷ 5 = $0.80 per 100 g
- Second: $8.80 ÷ 10 = $0.88 per 100 g
- The cheaper unit price is better value.
6.Which is better value: oats at $17.20 for 2 kg, or at $9.50 for 1 kg?
Answer: $17.20 for 2 kg ($0.86 per 100 g)
- First: $17.20 ÷ 20 = $0.86 per 100 g
- Second: $9.50 ÷ 10 = $0.95 per 100 g
- The cheaper unit price is better value.
7.Which is better value: juice at $15.20 for 2 L, or at $1.45 for 250 mL?
Answer: $1.45 for 250 mL ($0.58 per 100 mL)
- First: $15.20 ÷ 20 = $0.76 per 100 mL
- Second: $1.45 ÷ 2.5 = $0.58 per 100 mL
- The cheaper unit price is better value.
8.Which is better value: rice at $4.20 for 1 kg, or at $1.45 for 500 g?
Answer: $1.45 for 500 g ($0.29 per 100 g)
- First: $4.20 ÷ 10 = $0.42 per 100 g
- Second: $1.45 ÷ 5 = $0.29 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.