Вера2 года назад
а) 11 7/12 + 6 11/18 = 11 21/36 + 6 22/36 = 18 7/36;
б) 5 5/9 - 2 4/7 = 5 35/63 - 2 36/63 = 2 62/63;
в) 9 - 2 3/7 = 6 4/7;
г) 7 8/15 + 8 17/20 = 7 32/60 + 8 51/60 = 16 23/60;
д) 15 8/21 - 6 5/14 = 15 16/42 - 6 15/42 = 9 1/42;
е) 4 - 4/5 = 3 1/5.