9th Grade Best Buys and Unit Prices Worksheet — Level 2 — Practice Set 3 — 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 3 — 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 $5.20 for 1 kg, or at $3.60 for 500 g?
Answer: $5.20 for 1 kg ($0.52 per 100 g)
- First: $5.20 ÷ 10 = $0.52 per 100 g
- Second: $3.60 ÷ 5 = $0.72 per 100 g
- The cheaper unit price is better value.
2.Which is better value: oats at $3.00 for 1 kg, or at $1.80 for 500 g?
Answer: $3.00 for 1 kg ($0.30 per 100 g)
- First: $3.00 ÷ 10 = $0.30 per 100 g
- Second: $1.80 ÷ 5 = $0.36 per 100 g
- The cheaper unit price is better value.
3.Which is better value: pencils at $3.06 for a pack of 6, or at $8.16 for a pack of 24?
Answer: $8.16 for a pack of 24 ($0.34 per pencil)
- First: $3.06 ÷ 6 = $0.51 per pencil
- Second: $8.16 ÷ 24 = $0.34 per pencil
- The cheaper unit price is better value.
4.Which is better value: oats at $5.80 for 2 kg, or at $3.90 for 1 kg?
Answer: $5.80 for 2 kg ($0.29 per 100 g)
- First: $5.80 ÷ 20 = $0.29 per 100 g
- Second: $3.90 ÷ 10 = $0.39 per 100 g
- The cheaper unit price is better value.
5.Which is better value: pencils at $14.88 for a pack of 24, or at $3.12 for a pack of 6?
Answer: $3.12 for a pack of 6 ($0.52 per pencil)
- First: $14.88 ÷ 24 = $0.62 per pencil
- Second: $3.12 ÷ 6 = $0.52 per pencil
- The cheaper unit price is better value.
6.Which is better value: juice at $16.00 for 2 L, or at $6.10 for 1 L?
Answer: $6.10 for 1 L ($0.61 per 100 mL)
- First: $16.00 ÷ 20 = $0.80 per 100 mL
- Second: $6.10 ÷ 10 = $0.61 per 100 mL
- The cheaper unit price is better value.
7.Which is better value: pencils at $12.96 for a pack of 24, or at $2.58 for a pack of 6?
Answer: $2.58 for a pack of 6 ($0.43 per pencil)
- First: $12.96 ÷ 24 = $0.54 per pencil
- Second: $2.58 ÷ 6 = $0.43 per pencil
- The cheaper unit price is better value.
8.Which is better value: oats at $6.80 for 1 kg, or at $3.90 for 500 g?
Answer: $6.80 for 1 kg ($0.68 per 100 g)
- First: $6.80 ÷ 10 = $0.68 per 100 g
- Second: $3.90 ÷ 5 = $0.78 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.
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