1) 1/6:2/3; 1 1/3 :2/3; 2) 4/9:1/3; 3 : 1/3; 2/5:1/3; решите уравнение :
1:2/3; 5/8:2/3; 5/12:1/3; 2/9:1/3; 6 -1/15=2/5 х:6=1/18
4/5:2/3; 2/3:2/3; 3/7:1/3; 4/15:1/3; 1 1/3 -а =5/6
6:2/3; 2/7:2/3; 1/6:1/3; 3/11:1/3; с -1/2=1/5
7/13:2/3; 1/3:2/3; 1/8:1/3; 1/3:1/3; 1/3+а=3/1
4/9:2/3; 3/5:2/3; 5/9 :1/3; 7/18:1/3;
10/11:2/3; 1/2:2/3; 5/6:1/3; 12/3:1/3;