8th Grade Best Buys and Unit Prices Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the 8th Grade ratios & rates worksheet.
Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Ratio & Rates8th 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 $8.90 for 1 kg, or at $4.20 for 500 g?
Answer: $4.20 for 500 g ($0.84 per 100 g)
- First: $8.90 ÷ 10 = $0.89 per 100 g
- Second: $4.20 ÷ 5 = $0.84 per 100 g
- The cheaper unit price is better value.
2.Which is better value: pencils at $4.80 for a pack of 12, or at $4.80 for a pack of 24?
Answer: $4.80 for a pack of 24 ($0.20 per pencil)
- First: $4.80 ÷ 12 = $0.40 per pencil
- Second: $4.80 ÷ 24 = $0.20 per pencil
- The cheaper unit price is better value.
3.Which is better value: pencils at $7.20 for a pack of 24, or at $2.64 for a pack of 6?
Answer: $7.20 for a pack of 24 ($0.30 per pencil)
- First: $7.20 ÷ 24 = $0.30 per pencil
- Second: $2.64 ÷ 6 = $0.44 per pencil
- The cheaper unit price is better value.
4.Which is better value: rice at $0.95 for 500 g, or at $2.90 for 1 kg?
Answer: $0.95 for 500 g ($0.19 per 100 g)
- First: $0.95 ÷ 5 = $0.19 per 100 g
- Second: $2.90 ÷ 10 = $0.29 per 100 g
- The cheaper unit price is better value.
5.Which is better value: juice at $7.00 for 1 L, or at $11.80 for 2 L?
Answer: $11.80 for 2 L ($0.59 per 100 mL)
- First: $7.00 ÷ 10 = $0.70 per 100 mL
- Second: $11.80 ÷ 20 = $0.59 per 100 mL
- The cheaper unit price is better value.
6.Which is better value: oats at $4.00 for 500 g, or at $8.70 for 1 kg?
Answer: $4.00 for 500 g ($0.80 per 100 g)
- First: $4.00 ÷ 5 = $0.80 per 100 g
- Second: $8.70 ÷ 10 = $0.87 per 100 g
- The cheaper unit price is better value.
7.Which is better value: juice at $5.20 for 2 L, or at $1.10 for 250 mL?
Answer: $5.20 for 2 L ($0.26 per 100 mL)
- First: $5.20 ÷ 20 = $0.26 per 100 mL
- Second: $1.10 ÷ 2.5 = $0.44 per 100 mL
- The cheaper unit price is better value.
8.Which is better value: pasta at $4.90 for 1 kg, or at $1.55 for 500 g?
Answer: $1.55 for 500 g ($0.31 per 100 g)
- First: $4.90 ÷ 10 = $0.49 per 100 g
- Second: $1.55 ÷ 5 = $0.31 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.