Resposta:
5/4
Explicação passo a passo:
Mmc (4,5,10) = 20
4,5,10: 2
2,5,5: 2
1,5,5: 5
1,1,1
= 2.2.5
= 4.5
= 20
= 3/4 + 4/5 - 3/10
= (5.3 + 4.4 - 2.3)/20
= (15+16-6)/20
= (15+10)/20
= 25/20 (:5)/(:5)
= 5/4
