Question

1/2.1/5+1/2.1/3-1/5.1/6+1/2+1/5

Answer 1

1/2.1/5+1/2.1/3-1/5.1/6+1/2+1/5=
1/10+1/6-1/30+1/2+1/5=
3.1/30+5.1/30-1/30+15.1/30+6.1/30=
3/30+5/30-1/30+15/30+6/30=
8/30-1/30+15/30+6/30=
7/30+15/30+6/30=
22/30+6/30=
28/30=
14/15