35/16+1/4-2 1/16= 1/8+2 3/5 +2 7/8= 6 11/12-3 1/6-1 1/4= 3 7/9-1 5/18+3 1/2=

3 5/16+1/4-2 1/16=(3 5/16-2 1/16)+1/4=1 4/16+1/4= 1 1/4+1/4= 1 2/4=1 1/2
1/8+2 3/5+2 7/8=(1/8+1 7/8)+2 3/5=8+2 3/5=10 3/5
6 11/12-3 1/6-1 1/4=(6 11/12-3 1/6)-1 1/4=3 9/12-1 1/4=3 1/4-1 1/4=2
3 7/9-1 5/18+3 1/2=(3 7/9-1 5/18)+3 1/2=45/18-3 1/2=5/2-3 1/2=2 1/2-3 1/2= -1

83/16 + 1/4 - 33/16 = 83/16+ 4/16 - 33/16 = 54/16 3 6/16
1/8 + 13/5 + 23/8 = 5/40 + 104/40 + 115/40 = 224/40 = 5 24/40
83/12 - 19/6 -5/4 = 83/12 - 38/12 - 15/12 = 30/12 = 2 6/30
34/9 - 23/18 + 7/2 = 68/18 - 23/18 + 63/18 = 108/18 = 6