Question

The morning temperature is −15 °F. By the afternoon, the temperature rises by 20 °F. Write an addition expression for the afternoon temperature, and then to show this, and find the temperature in the afternoon.

Answer 1

To calculate the afternoon temperature from a morning temperature of -15 °F with a 20 °F increase, you add the two together resulting in an afternoon temperature of 5 °F.

Step-by-step explanation:

To find the afternoon temperature, we need to start with the morning temperature of −15 °F and add the increase in temperature that occurs by the afternoon, which is 20 °F. Our addition expression for this is:

−15 °F + 20 °F = 5 °F

So, by incorporating the initial morning temperature and accounting for the subsequent temperature rise, the afternoon temperature settles at 5 °F. This computation demonstrates the increase from the morning's frigid temperature to a warmer 5 °F by the afternoon, showcasing the effect of the temperature shift over the course of the day.