PEMDAS =
Parenthesis
Exponents
Multiply
Divide
Add
Subtract
5+2-9-4+7=? Remember that you have to add first, because of PEMDAS.
(5+2+7) + (-9-4) = ?
We put these in parenthesis to show what we are adding and subtracting together.
(14) + (-13) = ?
1
~Hope I helped!~