3 5/6-5/16*4/5=
5/16*4/5=1/4
3 5/6-1/4=23/6-1/4=46/12-3/12=43/12=3 7/12
11/3 Х:23/4=57/23:57/11
11/3 х:23/4=11/23
11/3 х=11/4
х=3/4
3 1/4 + 6,4 - 7,5 = 2,15
1) 3 1/4 + 6,4 = 3,25 + 6,4 = 9,65
2) 9,65 - 7,5 = 2,15
2/11 * (14 1/3 + 2 1/6) = 3
1) 14 1/3 + 2 1/6 = 14 2/6 + 2 1/6 = 16 3/6 = 16 1/2
2) 2/11 * 16 1/2 = 2/11 * 33/2 = 33/11 = 3