Question

resolva a soma de fração
a)1/5+2/3+6/5
b)2/3+1/6+3/2
c)7/5+2/3+1/5
d)3/2+1/7+2/3
Me ajude, gente pfvr

Answer 1

Olá

Vamos lá,


a)1/5+2/3+6/5   mmc=3.5=15
    3+ 10 + 18   31
= ---------------= ---
        15            15
 
b)2/3+1/6+3/2  mmc=18
    12+3+27     42 :2  21 :3  7
=-------------- = ---- = ----- = ----  
        18            18 :2  9  :3  3

c)7/5+2/3+1/5   mmc=15
    21+10+3     34
= ------------- = ---
       15            15

d)3/2+1/7+2/3   mmc = 2.3.7=42
    62+6+28     96 :2  48 :3 16
= ------------- = ---- = ----- =  ---
           42        42 :2  21 : 3  7