Найдите значения выражения: а) 25×(7/10+3/5+1/2); б)(5/12+1/6+3/8):15/16; в) 5:1 1/4+7:1 1/3; г) 1/2+3/4×8/15-3/10

а) 1) 7/10 + 3/5 = 7/10 + 6/10 = 13/10 = 1 3/10;2) 1 3/10 + 1/2 = 1 3/10 + 5/10 = 1 8/10 = 1 4/5;3) 25 * 1 4/5 = 25/1 * 9/5 = 5/1 * 9/1 = 45/1 = 45.Ответ: 45.б) 1) 5/12 + 1/6 = 5/12 + 2/12 = 7/12;2) 7/12 + 3/8 = 14/24 + 9/24 = 23/24;3) 23/24 : 15/16 = 23/24 * 16/15 = 23/3 * 2/15 = 46/45 = 1 1/45.Ответ: 1 1/45.в) 1) 5 : 1 1/4 = 5/1 : 5/4 = 5/1 * 4/5 = 1/1 * 4/1 = 4/1 = 4;2) 7 : 1 1/3 = 7/1 : 4/3 = 7/1 * 3/4 = 21/4 = 5 1/4;3) 4 + 5 1/4 = 9 1/4.Ответ: 9 1/4.г) 1) 3/4 * 8/15 = 1/1 * 2/5 = 2/5;2) 1/2 + 2/5 = 5/10 + 4/10 = 9/10;3) 9/10 - 3/10 = 6/10 = 3/5.Ответ: 3/5.