Пошаговое объяснение:
1) 15/28 * 1 17/25 = 15/28 * 42/25 = 3/4 * 6/5 = 18/20 = 9/10
2) 4 : 1 11/17 = 4 : 28/17 = 4 * 17/28 = 1*17/7 = 17/7 = 2 3/7
3) -16/5 + 9/10 + 2 3/7 = -3 1/5 + 9/10 + 2 3/7 = -3 14/70 + 63/70 + 2 30/70 =
-2 84/70 + 63/70 + 2 30/70 = -2 21/70 + 2 30/70 = 9/70
Пошаговое объяснение:
1) 15/28 * 1 17/25 = 15/28 * 42/25 = 3/4 * 6/5 = 18/20 = 9/10
2) 4 : 1 11/17 = 4 : 28/17 = 4 * 17/28 = 1*17/7 = 17/7 = 2 3/7
3) -16/5 + 9/10 + 2 3/7 = -3 1/5 + 9/10 + 2 3/7 = -3 14/70 + 63/70 + 2 30/70 =
-2 84/70 + 63/70 + 2 30/70 = -2 21/70 + 2 30/70 = 9/70