Read this word problem.

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?
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1 answer

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.

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