(3 1/3 + 5 1/6) * 2/5 - 2 3/4 : (1 1/2 - 2/5) = 9/10
1) 3 1/3 + 5 1/6 = 3 2/6 + 5 1/6 = 8 3/6 = 8 1/2
2) 8 1/2 * 2/5 = 17/2 * 2/5 = 17/5 = 3 2/5
3) 1 1/2 - 2/5 = 1 5/10 - 4/10 = 1 1/10
4) 2 3/4 : 1 1/10 = 11/4 : 11/10 = 11/4 * 10/11 = 10/4 = 2 2/4 = 2 1/2
5) 3 2/5 - 2 1/2 = 3 4/10 - 2 5/10 = 2 14/10 - 2 5/10 = 9/10