Let’s solve each problem step by step, explaining the concept of
unit rate — which means finding the cost, amount, or measurement
per one unit (e.g., per pound, per hour, per ounce, per pencil, etc.).
---
Problem 1:
> Ashley bought 3 pounds of apples for $0.72. Find the cost of one pound of apple.
✔ Solution:
To find the cost
per pound, divide total cost by number of pounds:
> $0.72 ÷ 3 = $0.24
✔️
Answer: A. $0.24
---
Problem 2:
> Jerald wrote a 96-page report in 6 hours. What is his unit rate of writing?
✔ Solution:
Unit rate = pages per hour → divide total pages by total hours:
> 96 pages ÷ 6 hours = 16 pages/hour
✔️
Answer: C. 16 pages/hour
---
Problem 3:
> A 7-ounce tomato has about 35 calories. What is the unit rate?
✔ Solution:
Unit rate = calories per ounce → divide total calories by ounces:
> 35 calories ÷ 7 ounces = 5 calories/ounce
✔️
Answer: B. 5 calories/ounce
---
Problem 4:
> Which would be a better buy, 8 pencils for $4.40 or 13 pencils for $6.5?
✔ Solution:
Find the
price per pencil for each option.
- Option 1: $4.40 ÷ 8 =
$0.55 per pencil
- Option 2: $6.50 ÷ 13 =
$0.50 per pencil
Since $0.50 < $0.55,
13 pencils for $6.50 is the better buy.
✔️
Answer: B. 13 pencils for $6.5
---
Problem 5:
> Which would be a better buy, 7 highlighters for $2.45 or 10 highlighters for $3?
✔ Solution:
Find the
price per highlighter.
- Option 1: $2.45 ÷ 7 =
$0.35 per highlighter
- Option 2: $3.00 ÷ 10 =
$0.30 per highlighter
Since $0.30 < $0.35,
10 highlighters for $3 is the better buy.
✔️
Answer: C. 10 highlighters for $3
---
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✔ Final Answers:
1.
A. $0.24
2.
C. 16 pages/hour
3.
B. 5 calories/ounce
4.
B. 13 pencils for $6.5
5.
C. 10 highlighters for $3
You’re all set! 😊
Parent Tip: Review the logic above to help your child master the concept of unit rate word problem worksheet.
