Resposta:
33/20
Explicação passo a passo:
= 3-3/2-8/5+7/4
Mmc (2,5,4) = 20
= (20.3 - 10.3 - 4.8 + 5.7)/20
= (60 - 30 - 32 + 35)/20
= (30 + 3)/20
= 33/20
2,5,4: 2
1,5,2: 2
1,5,1: 5
1,1,1
= 2.2.5
= 4.5
= 20
R.: 33/20
