Ответ:
233
а)3/16+5/16 = 8/16 = 1/2
7/9-1/9 = 6/9 = 2/3
9/14 + 1/14 = 10/14 = 5/7
11/20 - 3/20 = 8/20 = 2/5
б)8/21 - 5/21 = 3/21 = 1/7
5/8 + 1/8 = 6/8 = 3/4
11/18 - 7/18 = 4/18 = 2/9
8/15 + 2/15 = 10/15 = 2/3
234
а)17/19 - 12/19 = 5/19
б)3/7 - 1/7 = 2/7
в)2/3 - 1/3 = 1/3
г)8/5 - 4/5 = 4/5
Пошаговое объяснение: