Question

One winter day, the temperature ranged from a high of 40 degrees Fahrenheit to a low of -5 degrees Fahrenheit. By how many degrees did the temperature change?

Answer 1

The highest temperature is: 40°F

The lowest temperature is: -5°F

In order to find the change in temperature, we need to substract the lowest temperature, from the highest temperature:

`\text{change}=\text{highest}-\text{lowest}`

We substitute our values:

`\text{change}=40-(-5)`

Since -(-5) becomes +5:

`\begin{gathered} \text{change}=40+5 \\ \text{change}=45 \end{gathered}`

Answer: the temperature changed by 45°F