2 1/6 + 1/18 * 3/4 = 2 5/24
выражением:
= 2 1/6 + (1*3)/(18*4) =
= 2 1/6 + ( 1*1 ) / (6*4) =
= 2 4/24 + 1/24 = 2 5/24
по действиям:
1) 1/18 * 3/4 = (1*3)/(18*4) = (1*1)/(6*4) = 1/24
2) 2 1/6 + 1/24 = (2*6+1)/6 + 1/24 = 13/6 + 1/24 =
= (13*4)/(6*4) + 1/24 = (52+1)/24 = 53/24 = 2 5/24