(2 4/9 + 1 1/6) * 1 4/5 - 3 1/9 : 2 1/3 = 5 1/6
1) 2 4/9 + 1 1/6 = 2 8/18 + 1 3/18 = 3 11/18
2) 3 11/18 * 1 4/5 = 65/18 * 9/5 = (13*1)/(2*1) = 13/2 = 6 1/2
3) 3 1/9 : 2 1/3 = 28/9 : 7/3 = 28/9 * 3/7 = (4*1)/(3*1) = 4/3 = 1 1/3
4) 6 1/2 - 1 1/3 = 6 3/6 - 1 2/6 = 5 1/6