найдите значения выражения а)1/4*4целых3/4*16/57+(4целых 3/4+1целых2/3 )16/21+2/27*4целых1/2

а) 1/4 * 4 3/4 * 16/57 + (4 3/4 + 1 2/3) * 16/21 + 2/27 * 4 1/2 = 5 5/9.1) 4 3/4 + 1 2/3 = 19/4 + 5/3 = (19 * 3 + 5 * 4)/12 = (57 + 20)/12 = 77/12 = 6 5/12;2) 1/4 * 4 3/4 = 1/4 * 19/4 = 19/16 = 1 3/16;3) 1 3/16 * 16/57 = 19/16 * 16/57 = 1/3;4) 6 5/12 * 16/21 = 77/12 * 16/21 = 11/3 * 4/3 = 44/9 = 4 8/9;5) 2/27 * 4 1/2 = 2/27 * 9/2 = 1/3;6) 1/3 + 4 8/9 = 1/3 + 44/9 = (1 * 3 + 44 * 1)/9 = (3 + 44)/9 = 47/9 = 5 2/9;7) 5 2/9 + 1/3 = 47/9 + 1/3 = (47 * 1 + 1 * 3)/9 = (47 + 3)/9 = 50/9 = 5 5/9.Ответ: 5 5/9.