Ответы и объяснения

2013-12-08T20:48:30+04:00
3 1/7 : 2/7 - 1 : 2 1/3 = 22/7 :2/7 - 1 : 7/3 = 22/7 x 7/2 - 1 x 3/7 =22/2 - 3/7 = 11/1 -3/7= 11-3/7=10 4/7