How do you simplify #5 + 2 (2 times 3)^2 - 7 + 8 ÷ 4(5 - 3)# using order of operations?

1 Answer
EZ as pi
Sep 27, 2016

#74#

Explanation:

In simplifying expressions with different operations, it is important to count the number of terms first. EAch term will simplify to a single answer and they will be added or subtracted in the last step.
Within each term, parentheses get done first, followed by powers and roots, then multiply and divide.

You can work in different terms in the same line.

#color(lime)(5)color(darkblue)( + 2 (2 times 3)^2) color(red)(- 7)color(mediumpurple)( + 8 ÷ 4(5 - 3))" "larr # there are 4 terms

#=color(lime)(5)color(darkblue)( + 2 (6)^2) color(red)(- 7)color(mediumpurple)( + 8 ÷ 4(2))#

#=color(lime)(5)color(darkblue)( + 2 (36)) color(red)(- 7)color(mediumpurple)( + 2(2))#

#=color(lime)(5)color(darkblue)( +72) color(red)(- 7)color(mediumpurple)( + 4)" "larr# move the subtract to the end

#=color(lime)(5)color(darkblue)( + 72)color(mediumpurple)( + 4) color(red)(- 7)#

#=74#

Related questions
See all questions in PEMDAS
Impact of this question
1325 views around the world
You can reuse this answer
Creative Commons License