the.com/order of operations
Math's way of saying do this before that, or watch everything fall apart.
means The agreed sequence for solving a math expression — parentheses, then exponents, then multiplication and division, then addition and subtraction — so that everyone gets the same answer from the same problem.
from Not coined by one person or moment; it crystallized gradually as algebraic notation spread and mathematicians needed a shared convention for reading strings of symbols the same way. The mnemonic 'PEMDAS' (Please Excuse My Dear Aunt Sally) is a classroom-teaching invention layered on top much later, a memory trick rather than the rule's true origin — the actual convention grew out of necessity as written math became more compact and ambiguous without it.
- the acronym
- PEMDAS, hiding decades of classroom arguments
- the controversy
- 8÷2(2+2) breaks the internet every few years
- the truth
- multiplication and division are actually equal rank, left to right
- the stakes
- wrong order turns correct numbers into nonsense