Read this word problem.

Question

In the morning, the temperature was
–
10°C. By the afternoon, it had risen to
–
2°C. What was the change in temperature from the morning to the afternoon?
To solve the problem, Luke subtracted
–
2–(
–
10) and came up with an answer of 8°C. Is Luke correct? Why or why not?
question
key idea
solution

Questions
answered
0
Time
elapsed
00 03 40
hr min sec
SmartScore
out of 100

Answer 1

Let's break down the problem step by step.

Key Idea:

To determine the change in temperature, we need to find the difference between the afternoon temperature and the morning temperature.

Morning and Afternoon Temperatures:

• Morning temperature: -10°C
• Afternoon temperature: -2°C

Change in Temperature Calculation:

To find the change in temperature, we subtract the morning temperature from the afternoon temperature:

\[ \text{Change in Temperature} = \text{Afternoon Temperature} - \text{Morning Temperature} \]

Substituting in the values:

\[ \text{Change in Temperature} = -2 - (-10) \]

This simplifies to:

\[ \text{Change in Temperature} = -2 + 10 = 8°C \]

Conclusion:

Luke's calculation is correct. The change in temperature from the morning to the afternoon is indeed 8°C.