Ответ:
1) 1 3/10
2) 2
3) 3
4) 1 5/6
5) 1 1/6
6) 6 6/7
Пошаговое объяснение:
1) 8 9/20 *2/13 = 169/20 * 2/13 = 13/10*1/1= 13/10= 1 3/10
2) 5 1/3 * 3/8 = 16/3 * 3/8 = 2/1 * 1/1 = 2/1 = 2
3) 10 1/2 * 2/7 = 21/2 * 2/7 = 3/1 * 1/1 = 3/1 = 3
4) 5/6 * 1 6/5 = 5/6 * 11/5 = 1/6 * 11/1 = 11/6 = 1 5/6
5) 3 1/9 * 3/8 = 28/9 * 3/8 = 7/3 * 1/2 = 7/6 = 1 1/6
6) 9 1/7 * 3/4 = 64/7 * 3/4 = 16/7 * 3/1 = 48/7 = 6 6/7