7th Grade Best Buys and Unit Prices Worksheet — Level 2 — 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 2 — 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: pasta at $0.55 for 250 g, or at $1.50 for 500 g?
Answer: $0.55 for 250 g ($0.22 per 100 g)
- First: $0.55 ÷ 2.5 = $0.22 per 100 g
- Second: $1.50 ÷ 5 = $0.30 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pencils at $3.18 for a pack of 6, or at $4.68 for a pack of 12?
Answer: $4.68 for a pack of 12 ($0.39 per pencil)
- First: $3.18 ÷ 6 = $0.53 per pencil
- Second: $4.68 ÷ 12 = $0.39 per pencil
- The cheaper unit price is better value.
3.Which is better value: juice at $8.90 for 1 L, or at $15.40 for 2 L?
Answer: $15.40 for 2 L ($0.77 per 100 mL)
- First: $8.90 ÷ 10 = $0.89 per 100 mL
- Second: $15.40 ÷ 20 = $0.77 per 100 mL
- The cheaper unit price is better value.
4.Which is better value: juice at $16.80 for 2 L, or at $7.10 for 1 L?
Answer: $7.10 for 1 L ($0.71 per 100 mL)
- First: $16.80 ÷ 20 = $0.84 per 100 mL
- Second: $7.10 ÷ 10 = $0.71 per 100 mL
- The cheaper unit price is better value.
5.Which is better value: pencils at $3.72 for a pack of 12, or at $0.72 for a pack of 6?
Answer: $0.72 for a pack of 6 ($0.12 per pencil)
- First: $3.72 ÷ 12 = $0.31 per pencil
- Second: $0.72 ÷ 6 = $0.12 per pencil
- The cheaper unit price is better value.
6.Which is better value: oats at $5.60 for 2 kg, or at $2.10 for 500 g?
Answer: $5.60 for 2 kg ($0.28 per 100 g)
- First: $5.60 ÷ 20 = $0.28 per 100 g
- Second: $2.10 ÷ 5 = $0.42 per 100 g
- The cheaper unit price is better value.
7.Which is better value: pasta at $6.10 for 1 kg, or at $3.65 for 500 g?
Answer: $6.10 for 1 kg ($0.61 per 100 g)
- First: $6.10 ÷ 10 = $0.61 per 100 g
- Second: $3.65 ÷ 5 = $0.73 per 100 g
- The cheaper unit price is better value.
8.Which is better value: pencils at $4.68 for a pack of 6, or at $21.60 for a pack of 24?
Answer: $4.68 for a pack of 6 ($0.78 per pencil)
- First: $4.68 ÷ 6 = $0.78 per pencil
- Second: $21.60 ÷ 24 = $0.90 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.