Jawabanmu

2014-05-05T18:44:44+07:00
5 1/2 = 5/2
6 2/3 = 20/3

20/1 - 5/2 - 20/3 = 120 - 15 - 40 / 6 ( disamakan penyebutnya )
                        = 65/6
                        = 10 5/6 sisanya

semoga membantu !!
2014-05-05T18:49:09+07:00
20-11/2-18/3 =
40/2-11/2-18/3=
87/6-36/6=51/6