Sir Our Maths teacher told that addition and multiplication goes parallel and Subtraction and division goes parallel . Sir Please explain the meaning in detail according to my age is 14 yrs 10 months 10 days.
Sir i request please dont reply that it outside of my expertise.
I am guessing your teacher means by "parallel" that they have the same priority
when performing the operations. However, that is not true. There is an abbreviation
we use, I hope it was introduced to you, called PEMDAS... which gives the correct
order of operations. It represents:
Which means, when simplifying expressions, we first do the parentheses, followed
by exponents, then multiplication and division (from left to right), then addition and
subtraction (in either order).
So, the only true "parallel" operations are addition and subtraction. Multiplication and
division are too, but they get performed from "left to right." Some examples, where I use
"/" for division and "*" for multiplication:
1. 10-2*3+8/4 = 10-6+2 = 4+2 = 6
2. 12/6*2 = (12/6)*2 = 2*2 = 4, NOT 12/(6*2) = 12/12 = 1...the correct answer is 4 (not 1).
For more, here some website that should help.
I hope this helps.