Question

1+(1/2-1/5)-(2/4-5/4)=

Answer 1

1+ (1/2 - 1/5 ) - (2/4-5/4)=
1+ (5/10-2/10) - (-3/4)=
1+ (3/10 - (-3)/4=
1+ 12/40 + (-30)/40=
1+ 42/40= 
43/40
Acho que he assim, espero q tenha ajudado!