document.write( "Question 115303: I am having difficulty adding these. I say we have to find the common denminator but someone else said just add them across. Would you tell me which way is right? Thanks so much for your help.\r
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\n" ); document.write( "\n" ); document.write( "Add. Write your answer as a common fraction or a mixed fraction
\n" ); document.write( "3/4 + 7/10 + 4/15
\n" ); document.write( "I am not sure but I came up with 14/20
\n" ); document.write( "Thank you again for you help.
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Algebra.Com's Answer #83897 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "REMEMBER:
\n" ); document.write( "\"Addition\" of \"rational\" numbers can be computed using \"the+\"\"least+\"\"common\"\"+denominator\", but a conceptually simpler definition involves only integer addition and multiplication:
\n" ); document.write( "\"a%2Fb+%2B+c%2Fd+=+%28ad+%2B+bc%29%2Fbd\"\r
\n" ); document.write( "\n" ); document.write( "So, you will have:\r
\n" ); document.write( "\n" ); document.write( "\"3%2F4+%2B+7%2F10+%2B+4%2F15\"………… the lest common denominator is \"60\"\r
\n" ); document.write( "\n" ); document.write( "\"%283%2F4%2960+%2B+%287%2F10%2960+%2B+%284%2F15%2960\"…………reduce\r
\n" ); document.write( "\n" ); document.write( "\"3%2A15%2B+7%2A6+%2B+4%2A4\"………… \r
\n" ); document.write( "\n" ); document.write( " \"45%2B+42+%2B+16\"………… \r
\n" ); document.write( "\n" ); document.write( "\"103\"………… the numerator becomes\r
\n" ); document.write( "\n" ); document.write( "Since the denominator, of course, is \"60\", so the fraction is \"103%2F60\" or \"1+%2843%2F60%29\"\r
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