7th Grade Best Buys and Unit Prices Worksheet — Level 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 — Answers
Find the price for the same amount of each (the unit price), then compare. Show your work.
1.Which is better value: oats at $5.10 for 1 kg, or at $2.05 for 500 g?
Answer: $2.05 for 500 g ($0.41 per 100 g)
- First: $5.10 ÷ 10 = $0.51 per 100 g
- Second: $2.05 ÷ 5 = $0.41 per 100 g
- The cheaper unit price is better value.
2.Which is better value: juice at $3.20 for 1 L, or at $9.40 for 2 L?
Answer: $3.20 for 1 L ($0.32 per 100 mL)
- First: $3.20 ÷ 10 = $0.32 per 100 mL
- Second: $9.40 ÷ 20 = $0.47 per 100 mL
- The cheaper unit price is better value.
3.Which is better value: pencils at $3.24 for a pack of 6, or at $7.68 for a pack of 12?
Answer: $3.24 for a pack of 6 ($0.54 per pencil)
- First: $3.24 ÷ 6 = $0.54 per pencil
- Second: $7.68 ÷ 12 = $0.64 per pencil
- The cheaper unit price is better value.
4.Which is better value: rice at $4.90 for 1 kg, or at $8.40 for 2 kg?
Answer: $8.40 for 2 kg ($0.42 per 100 g)
- First: $4.90 ÷ 10 = $0.49 per 100 g
- Second: $8.40 ÷ 20 = $0.42 per 100 g
- The cheaper unit price is better value.
5.Which is better value: juice at $0.90 for 250 mL, or at $3.40 for 2 L?
Answer: $3.40 for 2 L ($0.17 per 100 mL)
- First: $0.90 ÷ 2.5 = $0.36 per 100 mL
- Second: $3.40 ÷ 20 = $0.17 per 100 mL
- The cheaper unit price is better value.
6.Which is better value: pencils at $8.16 for a pack of 12, or at $18.96 for a pack of 24?
Answer: $8.16 for a pack of 12 ($0.68 per pencil)
- First: $8.16 ÷ 12 = $0.68 per pencil
- Second: $18.96 ÷ 24 = $0.79 per pencil
- The cheaper unit price is better value.
7.Which is better value: pencils at $5.16 for a pack of 12, or at $9.12 for a pack of 24?
Answer: $9.12 for a pack of 24 ($0.38 per pencil)
- First: $5.16 ÷ 12 = $0.43 per pencil
- Second: $9.12 ÷ 24 = $0.38 per pencil
- The cheaper unit price is better value.
8.Which is better value: juice at $2.25 for 250 mL, or at $10.80 for 1 L?
Answer: $2.25 for 250 mL ($0.90 per 100 mL)
- First: $2.25 ÷ 2.5 = $0.90 per 100 mL
- Second: $10.80 ÷ 10 = $1.08 per 100 mL
- The cheaper unit price is better value.
Marking tips
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