8th Grade Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 4 — 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 4 — 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 $3.80 for 1 kg, or at $1.35 for 500 g?
Answer: $1.35 for 500 g ($0.27 per 100 g)
- First: $3.80 ÷ 10 = $0.38 per 100 g
- Second: $1.35 ÷ 5 = $0.27 per 100 g
- The cheaper unit price is better value.
2.Which is better value: rice at $1.65 for 500 g, or at $5.00 for 1 kg?
Answer: $1.65 for 500 g ($0.33 per 100 g)
- First: $1.65 ÷ 5 = $0.33 per 100 g
- Second: $5.00 ÷ 10 = $0.50 per 100 g
- The cheaper unit price is better value.
3.Which is better value: rice at $3.90 for 500 g, or at $6.80 for 1 kg?
Answer: $6.80 for 1 kg ($0.68 per 100 g)
- First: $3.90 ÷ 5 = $0.78 per 100 g
- Second: $6.80 ÷ 10 = $0.68 per 100 g
- The cheaper unit price is better value.
4.Which is better value: pencils at $1.92 for a pack of 12, or at $1.74 for a pack of 6?
Answer: $1.92 for a pack of 12 ($0.16 per pencil)
- First: $1.92 ÷ 12 = $0.16 per pencil
- Second: $1.74 ÷ 6 = $0.29 per pencil
- The cheaper unit price is better value.
5.Which is better value: pencils at $8.88 for a pack of 24, or at $3.12 for a pack of 6?
Answer: $8.88 for a pack of 24 ($0.37 per pencil)
- First: $8.88 ÷ 24 = $0.37 per pencil
- Second: $3.12 ÷ 6 = $0.52 per pencil
- The cheaper unit price is better value.
6.Which is better value: juice at $6.80 for 2 L, or at $4.90 for 1 L?
Answer: $6.80 for 2 L ($0.34 per 100 mL)
- First: $6.80 ÷ 20 = $0.34 per 100 mL
- Second: $4.90 ÷ 10 = $0.49 per 100 mL
- The cheaper unit price is better value.
7.Which is better value: juice at $2.05 for 250 mL, or at $13.20 for 2 L?
Answer: $13.20 for 2 L ($0.66 per 100 mL)
- First: $2.05 ÷ 2.5 = $0.82 per 100 mL
- Second: $13.20 ÷ 20 = $0.66 per 100 mL
- The cheaper unit price is better value.
8.Which is better value: rice at $3.45 for 500 g, or at $7.50 for 1 kg?
Answer: $3.45 for 500 g ($0.69 per 100 g)
- First: $3.45 ÷ 5 = $0.69 per 100 g
- Second: $7.50 ÷ 10 = $0.75 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.