# How do you evaluate #(- 95) - ( - 68) + 39+ 4#?

##### 1 Answer

Mar 10, 2018

#### Answer:

16

#### Explanation:

When we subtract a negative number, we end up adding. I'll describe this using *cold cubes* (each one makes the temperature 1 degree colder) and *hot cubes* (each one makes the temperature 1 degree hotter):

Let's say we have a place where there are a bunch of *cold cubes* and a bunch of *hot cubes* and together the temperature is

The next operation says to add 39 hot cubes. The temperature will go up again:

And we add 4 more hot cubes: