Пошаговое объяснение:
1) 2/5 : 1/3 = 2/5 * 3 = 6/5 = 6:5
2) 4/7 : 1/2 = 4/7 * 2 = 8/7 = 8:7
3) 5/6 : 3/8 = 5/6 * 8/3 = (5*8)/(6*3) = 40/18 = 20/9 = 20:9
4) 3 1/9 : 2 1/6 = 28/9 : 13/6 = 28/9 * 6/13= 168/117 = 168:117
5) 1 5/12 : 2/15 = 17/15 : 2/15 = 17/15 * 15/2 = 17/2 = 17:2
6) 1/8 : 1 7/12 = 1/8 : 19/12 = 1/8 * 12/19 = 3/38 = 3:38
Пошаговое объяснение:
1) 2/5 : 1/3 = 2/5 * 3 = 6/5 = 6:5
2) 4/7 : 1/2 = 4/7 * 2 = 8/7 = 8:7
3) 5/6 : 3/8 = 5/6 * 8/3 = (5*8)/(6*3) = 40/18 = 20/9 = 20:9
4) 3 1/9 : 2 1/6 = 28/9 : 13/6 = 28/9 * 6/13= 168/117 = 168:117
5) 1 5/12 : 2/15 = 17/15 : 2/15 = 17/15 * 15/2 = 17/2 = 17:2
6) 1/8 : 1 7/12 = 1/8 : 19/12 = 1/8 * 12/19 = 3/38 = 3:38