7th Grade Best Buys and Unit Prices Worksheet — Level 3 — 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 3 — 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: juice at $2.50 for 1 L, or at $1.20 for 2 L?
Answer: $1.20 for 2 L ($0.06 per 100 mL)
- First: $2.50 ÷ 10 = $0.25 per 100 mL
- Second: $1.20 ÷ 20 = $0.06 per 100 mL
- The cheaper unit price is better value.
2.Which is better value: oats at $2.50 for 500 g, or at $11.80 for 2 kg?
Answer: $2.50 for 500 g ($0.50 per 100 g)
- First: $2.50 ÷ 5 = $0.50 per 100 g
- Second: $11.80 ÷ 20 = $0.59 per 100 g
- The cheaper unit price is better value.
3.Which is better value: pencils at $6.84 for a pack of 12, or at $18.00 for a pack of 24?
Answer: $6.84 for a pack of 12 ($0.57 per pencil)
- First: $6.84 ÷ 12 = $0.57 per pencil
- Second: $18.00 ÷ 24 = $0.75 per pencil
- The cheaper unit price is better value.
4.Which is better value: pasta at $0.85 for 250 g, or at $0.70 for 500 g?
Answer: $0.70 for 500 g ($0.14 per 100 g)
- First: $0.85 ÷ 2.5 = $0.34 per 100 g
- Second: $0.70 ÷ 5 = $0.14 per 100 g
- The cheaper unit price is better value.
5.Which is better value: juice at $1.85 for 250 mL, or at $12.80 for 2 L?
Answer: $12.80 for 2 L ($0.64 per 100 mL)
- First: $1.85 ÷ 2.5 = $0.74 per 100 mL
- Second: $12.80 ÷ 20 = $0.64 per 100 mL
- The cheaper unit price is better value.
6.Which is better value: pencils at $6.24 for a pack of 24, or at $1.14 for a pack of 6?
Answer: $1.14 for a pack of 6 ($0.19 per pencil)
- First: $6.24 ÷ 24 = $0.26 per pencil
- Second: $1.14 ÷ 6 = $0.19 per pencil
- The cheaper unit price is better value.
7.Which is better value: juice at $10.00 for 2 L, or at $1.40 for 250 mL?
Answer: $10.00 for 2 L ($0.50 per 100 mL)
- First: $10.00 ÷ 20 = $0.50 per 100 mL
- Second: $1.40 ÷ 2.5 = $0.56 per 100 mL
- The cheaper unit price is better value.
8.Which is better value: oats at $1.70 for 1 kg, or at $1.35 for 500 g?
Answer: $1.70 for 1 kg ($0.17 per 100 g)
- First: $1.70 ÷ 10 = $0.17 per 100 g
- Second: $1.35 ÷ 5 = $0.27 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.
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