先乘除，再加減，那個拽英語的，來看看

那個問題肯本用不到maths degree的知識來解決，小學的內容而已。所以我說是我今天看到最可笑的

至於你提到的PEMDAS——

This just tells you the RANKS of the operations: Parentheses outrank exponents, which outrank multiplication and division and these two outrank addition and subtraction

But multiplication and division are at the SAME rank, and so are addition and subtraction

When you have a bunch of operations of the same rank, you just operate FROM LEFT TO RIGHT

Prove me wrong?! 

千萬別讓人覺得學數學的，語文/英語就特別爛，先乘除再加減 不等於 先乘再除再加再減

PEMDAS doesn't mean m first then d then a then s