How do you simplify #90 div9 - 2# using order of operations?

3 Answers
May 1, 2018

See below


Step 1) Divide 90 by 9


This is because division comes before subtraction if there are no brackets involved.

Step 2) Subtract 2 from the answer in step 1.


Division and multiplication come before subtraction or addition.

May 1, 2018



PEMDAS is an acronym for the words parenthesis, exponents, multiplication, division, addition, subtraction.

We start at the top with parenthesis which are not in this equation so we move to the next level.

There are also no exponents in this equation so we move onto the next level.

The next level is multiplication and division which shows up in your equation.
#90divide9# is the division so we solve this first which comes out to 10.

The next level is addition and subtraction which is #(90divide9)-2# = #10-2# which is 8.

I hoped this help!



PEMDAS stands for Parenthesis, Exponents, Division, Addition, and Subtraction. Basically you have to follow the order and complete the operations in that specific order. Scan your equation and go in the PEMDAS order. Use it as checklist.

Let's look at your equation #90/9-2#, first there are no parenthesizes, no exponents, no multiplications, but there is division so lets do that first. 90/9=10 and now continuing through our checklist we have no addition but we do have subtraction. So all you have to do now is take your 10 and subtract it with 2. 10-2=8

Remember follow the order of PEMDAS and complete the operations in that specific order. If you have an equation that has more than one of subtraction operation (or of any other PEMDAS) just complete the operation left to right.