Пошаговое объяснение:
1) 2 1/3 x 1 1/5 = 7/3 x 6/5 = 14/5 = 2 4/5
2)2 7/9 x 3 3/5 = 25/9 x 18/5 = 25/1 x 2/5 = 5/1 x 2/1 = 10/1 = 10
3)2 1/2 x 1 3/5 = 5/2 x 8/5 = 1/1 x 4/1 = 4/1 = 4
4)3 7/9 x 1 1/17 = 34/9 x 18/17 = 2/1 x 2/1 = 4/1 = 4
