Let's solve each of the four problems step by step.
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1. TEMPERATURE
Problem: Suppose the temperature outside is dropping 3 degrees each hour. How much will the temperature drop in 8 hours?
Solution:
- Temperature drop per hour = 3 degrees
- Time = 8 hours
Total drop = rate × time
= 3 degrees/hour × 8 hours
=
24 degrees
✔ Answer: The temperature will drop by
24 degrees in 8 hours.
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2. DIVING
Problem: A deep-sea diver descends below the surface of the water at a rate of 60 feet each minute. What is the depth of the diver after 10 minutes?
Solution:
- Descent rate = 60 feet/minute
- Time = 10 minutes
Depth = rate × time
= 60 feet/minute × 10 minutes
=
600 feet
✔ Answer: The diver will be at a depth of
600 feet after 10 minutes.
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3. STOCK
Problem: A computer stock lost 2 points each hour for 6 hours. Find the total points the stock fell.
Solution:
- Loss per hour = 2 points
- Time = 6 hours
Total loss = 2 points/hour × 6 hours
=
12 points
✔ Answer: The stock fell by
12 points.
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4. DROUGHT
Problem: A drought can cause the level of the local water supply to drop by a few inches each week. Suppose the level of the water supply drops 2 inches each week. How far will it have dropped in 4 weeks?
Solution:
- Drop per week = 2 inches
- Time = 4 weeks
Total drop = 2 inches/week × 4 weeks
=
8 inches
✔ Answer: The water level will have dropped by
8 inches in 4 weeks.
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✔ Final Answers:
1.
24 degrees
2.
600 feet
3.
12 points
4.
8 inches
All problems involve
multiplying a rate by time to find total change. This is a basic application of the formula:
>
Total Change = Rate × Time
Parent Tip: Review the logic above to help your child master the concept of integer word problems worksheet.
