Помогите решить пример 1\5-(-1\9)+(-5 1\3)+5\9-0,2

1/5-(-1/9)+(-5 1/3)+5/9-0,2= - 4 целых 2/3 1)1/5-(-1/9)=1/5+1/9=1*9/45+1*5/45=14/45 2) 14/45+(-5 1/3)=14/45-16/3=14/45-15*16/45=14/45-240/45=-226/45=-5 1/45 3) -5 1/45+5/9=226/45+5*5/45=-226/45+25/45= -201/45=- 4 21/45=-4 7/15 4) - 4 7/15-0,2=-67/15-2/10=-67*2/30-2*3/30=-134/30-6/30=-140/30=-14/3= - 4 2/3