SOLUTION: just started pre-ap math and need just some advice as parents are a bit out-dated with the new math I got one answer, my dad another and my mom another so please help --thanks

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Question 897530: just started pre-ap math and need just some advice as parents are a bit out-dated with the new math
I got one answer, my dad another and my mom another so please help
--thanks
-3/4+1/5+2/9=??
Found 2 solutions by lwsshak3, MathTherapy:
Answer by lwsshak3(11628)   (Show Source): You can put this solution on YOUR website!
-3/4+1/5+2/9=??
change each fraction so they have a common denominator (don't have to be the lowest)
use the product of the 3 denominators for a common denominator=4*5*9=180
divide each denominator into 180 and multiply the numerator by this answer.
For example: 180/4=45: 3*45=135=numerator

sorry, I thought the procedure would be simpler to explain.
For problems with fractions like these, the idea is to find a common denominator for each fraction so you can just add the numerators to get the answer.
Answer by MathTherapy(10555)   (Show Source): You can put this solution on YOUR website!
just started pre-ap math and need just some advice as parents are a bit out-dated with the new math
I got one answer, my dad another and my mom another so please help
--thanks
-3/4+1/5+2/9=??




You need to determine the least common denominator (LCD). In this case, it is: 180

 =  

    =  

    =  



Thus,  becomes: , or _____ 

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