Example Question #1 : Measurement
On a particular November day, it is and sunny in Tucson, Arizona. On the eastern side of the United States, it is and sleeting in New Castle, Pennsylvania. How many degrees warmer is it in Tucson than New Castle?
There are several ways that we could solve this problem. First, we can say that the temperature in New Castle is below zero and in Tucson it is above zero; therefore we can say:
Also, we can solve this problem by using a number line. New Castle’s temperature is units away from zero and Tucson’s is units away.
We can see that Tucson is warmer than New Castle.