Yeah but why?
PEMDAS Gone Learn Today: "Why you can't trust your calculator, or What is 48/2(9+3)?"
- Thread starter newworldafro
- Start date
Yeah but why?
Yeah but why?
Domingo Halliburton
Handmade in USA
not necessarily. Mult and division are on the same level.
example:
30 / 5 • 3 = 18
you go left to right.
dunno, no real reason. i just proceeded to move from right to left because i was already on that side. Honestly, it depends on how its written.
-DMP-
Jhoon
Spontaneous Mishaps and Hijinks
ask the person who did pemdas
Idk I thought the multiply and divide was to be done collectively
But you and @-DMP- are doing it wrong. You always multiply or divide from left to right ... depending on which comes first. Then you would add/subtract from left to right in the same manner.
you're right, thats why i said its ultimately how it is written ( i envisioned the parentheses being outside the denominator) . The calculator is a little ambiguous but you are right. after you do the parentheses you go back to left from right.
Multiplication and division are the same precedence but because we move left from right, you do division first.
-DMP-
Gotta do the parentheses first.
Thats the problem.
You can't tell if the division sign applies to the term in the parentheses or not in addition to the 2.
AS STATED, the answer is 288.
48 / 2 x (9+3)
48 / 2 x 12
24 x 12
288
Domingo Halliburton
Handmade in USA
Yeah I agree. I was just pointing out how people are arriving at 2.
It basically depends if you assume (9+3) is part of the numerator, or part of the denominator of the fraction 48/2. It's really dumb. As long as you specify with parentheses, you're in the clear.
This just shows why its important that you actually understand PEMDAS & basic order of operations. You shouldn't automatically accept a calculators answer as correct, it should match a general answer you already have
I can answer this. Whenever you have something like 48/2(9+3) you NEVER assume that the (9+3) is in the denominator. At least from the convention I have seen mathematics written, and from the order of operations calculators use. You always assume 48/2 is multiplied by (9+3). The only way you can say the (9+3) is on the denominator is if it explicitly says so like in 48/[2(9+3)].
So using that logic you get the same answer whether you multiply 48 times 12 then divide by 2, or if you divide 48 by 2 then multiply by twelve.
So using that logic you get the same answer whether you multiply 48 times 12 then divide by 2, or if you divide 48 by 2 then multiply by twelve.
