https://en.wikipedia.org/wiki/Order_of_operations
The acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication/Division, Addition/Subtraction,[22] is common in the United States[23] and France.[24] Sometimes the letters are expanded into words of a mnemonic sentence such as “Please Excuse My Dear Aunt Sally”.
This, right here, is why high school ought to still have classes like shop and home ec – and not just for the “technical track” kids who aren’t planning on going to college.