(6-4 8/5):2.2 под действием

(6 - 4 8/5) : 2,2 = 2/111) 6 - 4 8/5 = 5 5/5 - 4 8/5 = 5 5/5 - 5 3/5 = 2/52) 2/5 : 2,2 = 2/5 : 2 1/5 = 2/5 : 11/5 = 2/5 * 5/11 = 2/11