(3/8-7/18)*3,6+(5/18+2/27): 1 11/27 решите !

=1/5

1)   3/8 - 7/18=27/72 - 28/72= - 1/72
2)   - 1/72 *3,6= - 1/72 * 36/10= - 1/20
3)   5/18+2/27=15/54+4/54=19/54
4)   19/54 : 1 11/27=19/54 : 38/27=19/54 * 27/38=1/4
5)   - 1/20+1/4= - 1/20+5/20=4/20=1/5