(2 3/5+1/4)x1 1/6= 3/4+2 1/2x1/6= 2 3/4x2 2/3-1 1/3=

1. (2 3/5+1/4)x1 1/6=
(13/5+1/4)×7/6=
(52/20+5/20)×7/6=
57/20×7/6=
399/120=
3 39/120

2. 3/4+2 1/2x1/6=
3/4+5/2×1/6=
3/4+5/12=
9/12+5/12=
14/12=
1 2/12 atau 7/6

3. 2 3/4x2 2/3-1 1/3=
11/4×8/3-4/3=
22/3-4/3=
18/3=
6