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asked Feb 26, 2012 in Pre-Algebra Answers by anonymous

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4 Answers

well for starters you have to find the least common deminator, here's an example.

2/3  +  1/4    = ?  

here the least common deminator is 12.

12 goes into 3 4 times,  4 x 2 =8

12 goes into 4 3 times, 3x 1 = 3

8/12 +   3/12 =  now you just add normally,   11/12
answered Feb 26, 2012 by Al Level 5 User (13,780 points)
  1.  3 6 3 9  9 18 6 18
answered Sep 8, 2012 by anonymous

You need to get the denominators (the numbers on the bottom) the same. Eg. 

2/3 + 1/5 
I'd I can convert both to be the same type of fractions the sum is easy. By making them 15ths (by multiplying the denominators) this will work. 

I need to convert 2/3 into 15ths - simply multiply top and bottom by 5 

2/3 = 10/15 

I now need to convert 1/5 into 15ths by multiplying top and bottom by 3 

1/5 = 3/15 

my sum is now 10/15 + 3/15 = 13/15

answered Sep 23, 2012 by anonymous
Find the LCD (Least Common Denaminator) then the LCD will be your deminator devide the LCD and the denaminator of the fraction then multiply the numerator



       2/3 - 3/4 =  8/12  9/12 = 1/12







                   hope it help        actualy im an asian kid :p grade four 10 years old.
answered Oct 10, 2012 by anonymous

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