resolva as fraçoes M.M.C?
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b)4/3+5/3=9/3
c)5/6+2/6=7/6
d)1/2+1/3=3/6+2/6=5/6
e)1/2+1/4=2/4+1/4=3/4
f)1/3+1/4=4/12+3/12=7/12
g)3/2-4/3=9/6-8/6=1/6
h)2/5-1/3=6/15-5/15=1/15
i)6/4-1/7+1/2=42/28-4/28+14/28=52/28
j)2/9+1/8-1/6=16/72+9/72-12/72=13/72
k)1/2+3=1/2+6/2=7/2
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