SOLUTION: The book says the answer to my question is 7/40. But i dont see how they got that answer when the problem is : -1/5 + 3/8 . Wouldnt i have to multiply to get fourty on the bottom,

Algebra ->  Algebra  -> Signed-numbers -> SOLUTION: The book says the answer to my question is 7/40. But i dont see how they got that answer when the problem is : -1/5 + 3/8 . Wouldnt i have to multiply to get fourty on the bottom,       Log On

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Question 49872: The book says the answer to my question is 7/40. But i dont see how they got that answer when the problem is : -1/5 + 3/8 . Wouldnt i have to multiply to get fourty on the bottom, and as far as i know this problem doesnt call for multiplication. Thanks for your help.
Answer by stanbon(48546) About Me  (Show Source):
You can put this solution on YOUR website!
-1/5 + 3/8
=-8/40 + 15/40
=7/40
Cheers,
Stan H.