8th Grade Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — 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 — 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: juice at $10.20 for 2 L, or at $4.20 for 1 L?
Answer: $4.20 for 1 L ($0.42 per 100 mL)
- First: $10.20 ÷ 20 = $0.51 per 100 mL
- Second: $4.20 ÷ 10 = $0.42 per 100 mL
- The cheaper unit price is better value.
2.Which is better value: oats at $16.60 for 2 kg, or at $9.20 for 1 kg?
Answer: $16.60 for 2 kg ($0.83 per 100 g)
- First: $16.60 ÷ 20 = $0.83 per 100 g
- Second: $9.20 ÷ 10 = $0.92 per 100 g
- The cheaper unit price is better value.
3.Which is better value: pasta at $1.90 for 250 g, or at $8.30 for 1 kg?
Answer: $1.90 for 250 g ($0.76 per 100 g)
- First: $1.90 ÷ 2.5 = $0.76 per 100 g
- Second: $8.30 ÷ 10 = $0.83 per 100 g
- The cheaper unit price is better value.
4.Which is better value: pencils at $2.16 for a pack of 6, or at $10.56 for a pack of 24?
Answer: $2.16 for a pack of 6 ($0.36 per pencil)
- First: $2.16 ÷ 6 = $0.36 per pencil
- Second: $10.56 ÷ 24 = $0.44 per pencil
- The cheaper unit price is better value.
5.Which is better value: rice at $1.90 for 1 kg, or at $1.20 for 2 kg?
Answer: $1.20 for 2 kg ($0.06 per 100 g)
- First: $1.90 ÷ 10 = $0.19 per 100 g
- Second: $1.20 ÷ 20 = $0.06 per 100 g
- The cheaper unit price is better value.
6.Which is better value: pencils at $0.90 for a pack of 6, or at $6.00 for a pack of 24?
Answer: $0.90 for a pack of 6 ($0.15 per pencil)
- First: $0.90 ÷ 6 = $0.15 per pencil
- Second: $6.00 ÷ 24 = $0.25 per pencil
- The cheaper unit price is better value.
7.Which is better value: pasta at $3.90 for 1 kg, or at $0.60 for 250 g?
Answer: $0.60 for 250 g ($0.24 per 100 g)
- First: $3.90 ÷ 10 = $0.39 per 100 g
- Second: $0.60 ÷ 2.5 = $0.24 per 100 g
- The cheaper unit price is better value.
8.Which is better value: rice at $1.85 for 500 g, or at $4.30 for 1 kg?
Answer: $1.85 for 500 g ($0.37 per 100 g)
- First: $1.85 ÷ 5 = $0.37 per 100 g
- Second: $4.30 ÷ 10 = $0.43 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.