Question

Which of the following is another way to express -13 - 7?

13 + (-7)
-13 + 7
-13 + (-7)
13 + 7

Answer 1

Explanation: When adding and subtracting positives and negatives,

if you have a minus sign in the problem, change it to plus a negative.

So -13 - 7 can be thought of as -13 + (-7).

Adding a negative is the same as subtracting a positive.