Piet Souris wrote:When I was in primary school (1962-1968) we had the sentence: Meneer Van Dam Wacht Op Antwoord, meaning powers, multiplication, division, square roots, addition, subtraction. It didn't mention parentheses, but the answer would have been 1. Like 3 - 3 + 3 would have been -3. But then came these computers, spoiling it all...
We used "Please Excuse My Dear Aunt Sally" - Parentesis, Exponents, Multiplication, Division, Addition, Subtraction. However the problem there is this implies all multiplication comes before all addition. I was taught multiplication and division go in order, left to right, and you do them all before you do the addition/subtraction in order, left to right.
that makes sense, since multiplication and division are really the same operation, as are addition/subtraction.
but your phrase really confuses me. You did square roots AFTER multiplication? what about cube roots, or fractional roots? and roots are again the same thing as powers, so why do they come so late? if you has a power of 3/2, do you do it as a power or as a root? PLEASE don't tell me you'd cube it, then multiply/divide, and THEN do the root. that would break my brain.