for fractions why do you multiply the reciprocal of the fraction for what reason????? not just to get the answer!
2006-12-10 04:36:46 · 6 answers · asked by aleiva_ musica! 2 in Science & Mathematics ➔ Mathematics
I'm guessing that you're asking about division. It's because division and multiplication are inverse operations and dividing by a value is the same as multiplying by its 'multiplicative inverse'.
Hope that helps ☺
Doug
2006-12-10 04:41:24 · answer #1 · answered by doug_donaghue 7 · 1⤊ 0⤋
This is the way the division is defined.
Take these examples. The half from 30 are 15.
Now consider this:
The half from 30 is (1/2)*30 and its equals to 30/2.
So, as you see, to multiply by the inverse of 2 (that is 1/2) is actually to divide by 2.
Hope this helps you understand that.
Ana
2006-12-10 12:42:06 · answer #2 · answered by Ilusion 4 · 1⤊ 0⤋
It's when you need to make it one. If you have 4/3x, you multiply it by 3/4 because 4 times 3 is 12, and 3 times 4 is 12, making 12/12, simplifies to 1/1, which is one!
2006-12-10 12:39:48 · answer #3 · answered by Firewheel 4 · 1⤊ 0⤋
We do not do it just to get answer.
There is proper rationale.
Suppose you want to know
how many halves are there in 12?
Obviously 1 has two halves.12 will have 24 halves.
How do you get this/
12/[1/2]
=12*2/1
=24
I hope the logic is clear to you!
2006-12-10 12:49:09 · answer #4 · answered by openpsychy 6 · 1⤊ 0⤋
It helps you balance out the equation
im not sure if thats what you were looking for but that is all that i can come up with.
2006-12-10 12:57:05 · answer #5 · answered by Megan 1 · 0⤊ 0⤋
ur question is not clear. u need to rephrase.
2006-12-10 12:40:20 · answer #6 · answered by ravish2006 6 · 0⤊ 1⤋