9th Grade Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 9th Grade ratios & rates worksheet.
Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Ratio & Rates9th Grade Best Buys and Unit Prices Worksheet — Level 2 — 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: pasta at $4.05 for 500 g, or at $7.00 for 1 kg?
Answer: $7.00 for 1 kg ($0.70 per 100 g)
- First: $4.05 ÷ 5 = $0.81 per 100 g
- Second: $7.00 ÷ 10 = $0.70 per 100 g
- The cheaper unit price is better value.
2.Which is better value: juice at $9.60 for 2 L, or at $1.40 for 250 mL?
Answer: $9.60 for 2 L ($0.48 per 100 mL)
- First: $9.60 ÷ 20 = $0.48 per 100 mL
- Second: $1.40 ÷ 2.5 = $0.56 per 100 mL
- The cheaper unit price is better value.
3.Which is better value: oats at $2.65 for 500 g, or at $8.20 for 2 kg?
Answer: $8.20 for 2 kg ($0.41 per 100 g)
- First: $2.65 ÷ 5 = $0.53 per 100 g
- Second: $8.20 ÷ 20 = $0.41 per 100 g
- The cheaper unit price is better value.
4.Which is better value: pencils at $1.80 for a pack of 12, or at $6.96 for a pack of 24?
Answer: $1.80 for a pack of 12 ($0.15 per pencil)
- First: $1.80 ÷ 12 = $0.15 per pencil
- Second: $6.96 ÷ 24 = $0.29 per pencil
- The cheaper unit price is better value.
5.Which is better value: pencils at $5.22 for a pack of 6, or at $12.00 for a pack of 12?
Answer: $5.22 for a pack of 6 ($0.87 per pencil)
- First: $5.22 ÷ 6 = $0.87 per pencil
- Second: $12.00 ÷ 12 = $1.00 per pencil
- The cheaper unit price is better value.
6.Which is better value: pencils at $4.32 for a pack of 24, or at $4.32 for a pack of 12?
Answer: $4.32 for a pack of 24 ($0.18 per pencil)
- First: $4.32 ÷ 24 = $0.18 per pencil
- Second: $4.32 ÷ 12 = $0.36 per pencil
- The cheaper unit price is better value.
7.Which is better value: juice at $4.10 for 1 L, or at $0.80 for 250 mL?
Answer: $0.80 for 250 mL ($0.32 per 100 mL)
- First: $4.10 ÷ 10 = $0.41 per 100 mL
- Second: $0.80 ÷ 2.5 = $0.32 per 100 mL
- The cheaper unit price is better value.
8.Which is better value: juice at $4.40 for 2 L, or at $0.25 for 250 mL?
Answer: $0.25 for 250 mL ($0.10 per 100 mL)
- First: $4.40 ÷ 20 = $0.22 per 100 mL
- Second: $0.25 ÷ 2.5 = $0.10 per 100 mL
- 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.