Вычислить (11,1:3-2 1/6):1 2/21;(3 5/6+1,5)*3/4

(11,1 : 3 - 2 1/6) : 1 2/21 = (3,7 - 2 1/6) : 1 2/21 = (3 7/10 - 2 1/6) : 1 2/21 = (37/10 - 13/6) : 1 2/21 = (37 * 3 - 13 * 5)/30 : 1 1/21 = (111 - 65)/30 : 1 1/21 = 46/30 : 22/21 = 23/15 * 21/22 = 23/5 * 7/22 = 161/110 = 1 51/110;

(3 5/6 + 1,5) * 3/4 = (3 5/6 + 1 5/10) * 3/4 = (3 5/6 + 1 1/2) * 3/4 = (23/6 + 3/2) * 3/4 = (23 * 1 + 3 * 3)/6 * 3/4 = (23 + 9)/6 * 3/4 = 32/6 * 3/4 = 8/2 = 4.