You seem to REALLY want to do addition before subtraction. They're actually just the opposites of the same operation. You do whichever you encounter FIRST working from left-to-right.
Let's rewrite the last steps of that problem:
36 - 16 + 6 = (+36) + (-16) + (+6)
Now what would you do first?
Hopefully you chose (+36) + (-16)
....different signs -- subtract to find the difference:
Now, solve this on your paper:
42 - 3(2 + 4) + 5 =
Order of Operations Automatic Flip-Through SLIDE SHOW
Overview of the Order of Operations
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