How can i improve my grades for school thats comming up?

Question

i mean i know that i need to study i got that but i just dont know how to divid fractions i need help how do i divid them and add them its really hard plz help me!!

Answer 1

Well dividing them is really quite simple as long as you know simple multiplication lets say that you have the problem (a/b)/(c/d) now for division you switch the numerator and denominator (the top and bottom) of the second fraction the equation is now (a/b)x(d/c) then you just multiply both the numerators (tops) then both the denominators (bottoms) so you get ad/bc and thats your answer from this you can plug in any numbers for example (4/10)/(15/6) then you get (4/10)x(6/15) to get 24/150 then you just simplify to get 12/75

Addition is harder because you have to find the LCD of the fractions, the easiest way to do this is to make fraction trees so you find the prime factorization of the numbers and take all the numbers that are in both and multiply them along with the ones that are different I mean if you have 150 and 246 150's prime factors are 3, 5, 5, 2 and 246's prime factors are 2, 3, 41 they both have a two and a three but 150 has two 5s as well and 246 has a 41 so you only multiply one set of the 2 and the 3 by the two 5s and the 41 to get 6150 which is the LCD you then divide this number by the original denominator then you multiply the numerator of the fraction by the LCD divided by the denominator then you put that product over the LCD once you do that for all fractions you add the numerators only and put the answer over the LCD you may be able to simplify once you do that

Answer 2

first, learn how to spell. its coming, not comming.

oh, and the fraction thing..

its too hard to explain.

go to funbrain.com,

and they have fun edcucational games teaching you how to do things like dividing fractions.

and many more.

hope this info helped.

:D