Sure! Let’s solve each problem step by step. The goal is to find the
unit rate — that means we want to know how much of something there is
per one unit (per kg, per hour, per minute, per serving, etc.).
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1. A 7-kg bag of apple for $10 → ______ per kg
We want cost
per 1 kg.
→ Divide total cost by total kg:
$ \frac{10}{7} \approx 1.43 $
✔ Answer: $1.43 per kg
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2. 810 miles in 10 hours → ______ miles per hour
Miles per hour = total miles ÷ total hours
→ $ \frac{810}{10} = 81 $
✔ Answer: 81 miles per hour
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3. Type 1000 words in 30 minutes → ______ words per minute
Words per minute = total words ÷ total minutes
→ $ \frac{1000}{30} \approx 33.33 $
✔ Answer: 33.33 words per minute
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4. 4500 jumps for 5 hours → ______ per hour
Jumps per hour = total jumps ÷ total hours
→ $ \frac{4500}{5} = 900 $
✔ Answer: 900 per hour
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5. 400 calories for 4 servings of pie → ______ calories per serving
Calories per serving = total calories ÷ number of servings
→ $ \frac{400}{4} = 100 $
✔ Answer: 100 calories per serving
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6. 150 chairs in 30 rows → ______ in each row
Chairs per row = total chairs ÷ number of rows
→ $ \frac{150}{30} = 5 $
✔ Answer: 5 in each row
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7. 90 students in 3 buses → ______ in each bus
Students per bus = total students ÷ number of buses
→ $ \frac{90}{3} = 30 $
✔ Answer: 30 in each bus
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8. Phone call costs $5 for 2 minutes → ______ $ per minute
Cost per minute = total cost ÷ total minutes
→ $ \frac{5}{2} = 2.5 $
✔ Answer: $2.50 per minute
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9. 1,000 miles in 5 hours → ______ miles per hour
Miles per hour = total miles ÷ total hours
→ $ \frac{1000}{5} = 200 $
✔ Answer: 200 miles per hour
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10. A 20-kg bag of cherries for $6.25 → ______ per kg
Cost per kg = total cost ÷ total kg
→ $ \frac{6.25}{20} = 0.3125 $
✔ Answer: $0.31 per kg (rounded to nearest cent)
*(Note: You can also write it as $0.3125, but money is usually rounded to two decimal places.)*
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✔ Final Answers:
1.
$1.43 per kg
2.
81 miles per hour
3.
33.33 words per minute
4.
900 per hour
5.
100 calories per serving
6.
5 in each row
7.
30 in each bus
8.
$2.50 per minute
9.
200 miles per hour
10.
$0.31 per kg
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Let me know if you’d like to see these as fractions or with more precise decimals!
Parent Tip: Review the logic above to help your child master the concept of unit rates worksheet 1 answers.
