How do you do a pemdas

Well first look for the parentheses (p) and do whatever is inside of them, for example, if the question was (2 x 3) + 45 - 2, you would do 2 x 3. Then look for exponents and solve those. For the 'm' and 'd', you should scan your question left to right. If you see multiplication come first, do that and then do the division, and vice versa. do the same for 'a' and 's'. check your answer with a calculator.