Ответ: 4,4
Пошаговое объяснение: 0,28+1 1/3=28/100+1 1/3=1+28/100+1/3=1+ +28*3/100*3+1*100/3*100=1+84/300+100/300=1+84+100/300=1+184/300= =1+46*4/75*4=1+46/75=1 46/75
1 46/75:11/30=46+1*75/75:11/30=121/75:11/30=121/75*30/11=121*30/75*11= =3630/825=22*165/5*165=22/5=4*5+2/5=4 2/5=4,4