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OpenStudy (anonymous):
add: 3/7+4/5
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OpenStudy (anonymous):
43/35
OpenStudy (anonymous):
[3(5)+4(7)]/35 15+28/35 43/35
OpenStudy (anonymous):
what about 5/8+1/5
OpenStudy (anonymous):
5/8+1/5 [5(5)+1(8)]/40 25+8/40 33/40
OpenStudy (anonymous):
6/7+2/9
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OpenStudy (saifoo.khan):
the main thing is to take the LCM when the denominators are different.
OpenStudy (anonymous):
[6(9)+2(7)]/63 54+14/63 68/63
OpenStudy (anonymous):
(3*5)+(4*7)/(7*5) =15+28/35 =43/35
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