Пошаговое объяснение:
1)
3/7 * 3/7 = 9/49
2)
8/25 * 45/28 = 2/5 * 9/7 = 18/35
3)
2 3/4 = 11/4
1 : 11/4 = 4/11 обратное числу 2 3/4
4)
25/42 : 20/21 = 25/42 * 21/20 = 5/2 * 1/4 = 5/8
5)
2 1/3 : 1 13/14 = 7/3 : 27/14 = 7/3 * 14/27 = 98/81 = 1 17/81
6)
3 3/8 : 18 = 27/8 * 1/18 = 3/8 * 1/2 = 3/16
Пошаговое объяснение:
1)
3/7 * 3/7 = 9/49
2)
8/25 * 45/28 = 2/5 * 9/7 = 18/35
3)
2 3/4 = 11/4
1 : 11/4 = 4/11 обратное числу 2 3/4
4)
25/42 : 20/21 = 25/42 * 21/20 = 5/2 * 1/4 = 5/8
5)
2 1/3 : 1 13/14 = 7/3 : 27/14 = 7/3 * 14/27 = 98/81 = 1 17/81
6)
3 3/8 : 18 = 27/8 * 1/18 = 3/8 * 1/2 = 3/16