вычислите: 2 1/52*26/49-3 3/7:1 5/11

2 1/52 * 26/49 - 3 3/7 : 1 5/11 = -1 182/637. 1). 2 1/52 * 26/49 = 105/52 * 26/49 = (105 * 26) / (52 * 49) = 2730/2548 = 1365/1274 = 1 182/1274;2). 3 3/7 : 1 5/11 = 24/7 : 16/11 = 24/7 * 11/16 = (24 * 11) / (7 * 16) = 264/112; 3). 1365/1274 - 264/112 = (1365 * 8) / (1274 * 8) - (264 * 91) / (112 * 91) = 10920/10192 - 24024/10192) = (10920 - 24024) / 10192 = -13104/10192 = -1638/1274 = -819/637 = -1 182/637.