A few days ago
eliminating fractions…LCD?
okay i know this is really elementary but i forgot all math this summer…! i know you eliminate fractions using a least common denominator…but i just got stuck! i know the answer but how do i get there
[(1/a)+(1/b)]/(a+b)
so i n case you didnt get that its 1 over a plus1 over b all over a plus b
i feel so stupid because my teacher said well of course you should know this and i was like well ya of course and then i did it and i got it wrong… =[ hellp!
Top 2 Answers
A few days ago
Favorite Answer
okay, so the lcd becomes ab, and you have
[a+b/ab]/a+b
then when you’re dividing with fractions, it’s the same as multiplying by 1 over whatever, right???
re-writing, you get
[(a+b)/ab] x 1/(a+b)
then when you multiply it out, the (a+b)’s cancel, which leaves
1/ab
I think that’s got it.
1
4 years ago
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