  ### Home > MC1 > Chapter 3 > Lesson 3.4.4 > Problem3-128

3-128.

Follow the order of operations (use circling the terms if it is helpful) to simplify the following expressions:

1.  $- 7 + 4 \div ( - 2 )$

If you need help with simplifying expressions, refer to problem 2-132. Try working it out on your own before checking the answer.

$\enclose{circle}[mathcolor="orange"]{\color{black}{- 7} } + \enclose{circle}[mathcolor="orange"]{\color{black}{-4 \div ( - 2 )}} \ \ {\color{orange}{\leftarrow}}$

$−9$

1.  $14 \div ( - 7 ) + - 8 ( 2 )$

Refer to part (a) if you are having trouble getting started. Remember to divide and multiply before adding or subtracting!

$−18$

1.  $( 8 + - 3 ) ( - 5 )$

This problem is similar to the previous two. Pay extra attention to parentheses!

Sophia thinks that the answer is $23$, because multiplication should come before addition. Do you agree with her? Is there any reason that you might need to add first in this problem?

1.  $( 4 - ( - 3 ) ) + ( 5 \div ( - 5 ) )$

This problem is similar to the previous three. Be careful to follow the order of operations as you calculate.