keep, change, flip
1/2 divided by 4/9
1/2 (keep) mutiplied by (change) 9/4 (flip).
That is essentially what the others, said, but that is how I learned it, and it seemed to make a lot more since than when I learned it the other way. Hope that helps!
One of the proud ZU Christians. Thanks Lioness for the avy and Ozma for the sig. <3 using old things ^^
I was raised by Bobslob, and raised Misti and J.J. 87 in that tradition. J'ai adopté FBI and last_defender
NAYRU!!!!! *Ahem* I am a proud Nayrulian.
If you are a visual learner, then teach your brain with this technique:
Work through the calculations as described above (multiplying the original fraction by the 2nd fraction's reciprocal) and THEN make two large pies (take up a whole page of paper or half of a page doing this...or just use mspaint on your compy or something) and do this:
let's say you have 1/4 divided by 1/2. So, you take the first of the two circles/pies you made, and cut it up into four equal sections.
Now, concentrate on that one-quarter section and cut IT up in TWO equal sections. The size of one of the smallest section is the size of the pieces of pie (or pizza....or cheese....or...vutevah) for the entire thing!
So, it's like this:
1/4 / 1/2 = 1/4*2/1=2/4=1/2
Now, to check our calculations with the pie-chart method-->
The Pizza Pie has four large pieces to it. We grab a slice and put it on our plate. Then, we cut that piece which is on our plate into two sections (in half). Basically, we pretend that the quarter-section of pizza-pie-a is ONE!! So, put that # on top and the number of pieces we cut it into on the bottom!!
ONE QUARTER OF THE PIE
____________________ =1/2 <--our answer.
TWO PIECES FROM THAT
If this sounds too kiddish to you, sorry, but there are always other ways to learn.
just cross multiply. for example 1/2 divided by 3/4, you multiply 2x3 and 1x4. or just flip the second fraction and multiply.
BBD: mmmmmmmmmmmm pie
serious quote: imagination is more important than knowledge- Albert Einstein
funny quote: I woke up one morning and all my stuff had been stolen and replaced with perfect duplicates- Steven Wright
-thanks to SearanoX for the great avy and siggy!
-read the Rules, they Rule you
-if you are ever in the chat and kedisar and pk-kitty are also in the chat, don't worry, they always do that.....
-I want Andi!
-I am really small for my age
-currently attempting to learn japanese
A formal explaination to the above method:
Say that you have two fractions: a/b and c/d.
We then want to solve the equation a/b / c/d.
Let's simplify a bit:
We know that any numbers (s*t)/(x*t) equals s/x. Therefor:
a/b / c/d = (a*d)/b / (c*d)/d = (a*d)/b / c/1 = (a*d)/(b*c) / c/(1*c) = (a*d)/(b*c) / 1/1 = (a*d)/(b*c)