Найдите значение выражения:

Вариант 1 а) (42/25 * 15/7 - 18/7 * 7/5) * 25/9 = (18/5 - 18/5) * 25/9 = 0 * 25/9 = 0 б) 1/2 + (31/6 - 15/4 + 1/2) * 10/23 = 1/2 + (62/12 - 45/12 + 6/12) * 10/23 = 1/2 + (23/12) * 10/23 = 1/2 + 10/12 = 6/12 + 10/12 = 16/12 = 4/3 = 1 1/3 в) (49/8 * 9/7 - 39/14 * 21/13) * 8/5 = (63/8 - 9/2) * 8/5 = (63/8 - 36/8) * 8/5 = 27/8 * 8/5 = 27/5 = 5 2/5 г) 8/7 * (9/16 + 14/3 * 9/56) = 8/7 * (9/16 + 3/4) = 8/7 * (9/16 + 12/16) = 8/7 * 21/16 = 3/2 = 1 1/2 Вариант 2 а) 95/9 - 39/32 * (74/15 + 46/15) = 95/9 - 39/32 * 120/15 = 95/9 - 39/32 * 8 = 95/9 - 39/4 = 380/36 - 351/36 = 29/36 б) 1/13 * (19/8 - 11/6) * 12/5 + 9/10 = 1/13 * (57/24 - 44/24) * 12/5 + 9/10 = 1/13 * 13/24 * 12/5 + 9/10 = 1/24 * 12/5 + 9/10 = 1/10 + 9/10 = 10/10 = 1 в) (83/15 - 47/10) * 8/3 - 5/9 = (166/30 - 141/30) * 8/3 - 5/9 = 25/30 * 8/3 - 5/9 = 5/6 * 8/3 - 5/9 = 40/18 - 5/9 = 20/9 - 5/9 = 15/9 = 5/3 = 1 2/3 г) (10/48 + 15/48) * (8/3 - 3/5) * 9/5 = 25/48 * (40/15 - 9/15) * 9/5 = 25/48 * 31/15 * 9/5 = (25 * 31 * 9) / (48 * 15 * 5) = 6975 / 3600 = 31/16 = 1 15/16