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You are not logged in. #1 20121223 07:26:53
question...This may seem like a wierd question, but here I go : If I have 8/3 . 8/5 = 64/15 why can't I reduce my two 8's at the beginning ? I can reduce my fractions diagonaly or I can reduce the number above the fraction sign and the other one below it. But why can't I do it in a straight line ? Would it be to hard to explain and I have to take it like it is ? Thank you (I like to understand how things works ^^) #2 20121223 08:02:32
Re: question...Hi AlAllo; Reduce the eights by what? In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #6 20121223 10:17:09
Re: question...One way of looking at it is You end up with a 4 on the top and on the bottom. You can cancel them. When you do the other one. There is nothing to cancel. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #7 20121223 11:04:30
Re: question...The way I look at it is like this, much like when you are working in algebra, if you do something to one side of an equation you have to do it to the other side of an equation for it to still be equal. and at the same time With what you are trying to do, you are dividing the same side of the equation by 8, twice. Going back to my simple example, 5+5=10, your action would look something like this, 5+533=10. And that just can't work, if you do something to a side, you have to do the opposite to keep the equation equal. So, what you did would look like this: And that equation is definitely not the same as #8 20121223 20:27:44
Re: question...hi AlAllo The twelve parts have been collected together into groups of 3 to show that 3 parts in 12 is the same as 1 part in 4 All cancelling relies on this. If there's a factor of the top that is also a factor of the bottom, you may cancel it. But cancelling a factor of the top with another factor of the top would change the value of the fractions completely. this is ok: because the eights are one on the top and one on the bottom. http://www.mathsisfun.com/equivalent_fractions.html Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei 