Question

2/5 + 9/10 - 1/2 fraçao

Answer 1

2/5+9/10(mmc de 5 e10)=10

10/5*2=4             4+9/10=13/10
10/10*9=9

subtração
13/10-1/2 (mmc de 10 e 2)=10
10/10*13=13
10/2*(-1)=-5

13-5/10=8/10
simplificando = 8/10 (divide por 2) = 4/5