# Chapter 9 - Basic Algebra - 9.2 Adding and Subtracting Signed Numbers - 9.2 Exercises: 79

12

#### Work Step by Step

According to the last step of order of operations, we must evaluate addition and subtraction from left to right. First, we only consider $4-(-13)$. Change the minus sign to a plus sign and insert the opposite of the second number in place of the second number. $4-(-13)=4+(13)=4+13=17$ Next, we can add this to -5. $17+(-5)=12$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.