1 7/8 - 1/4 =15/8 - 2/8=13/8=1 5/8
2 5/6 + 1 1/3= 3 5/6 + 2/6 =3 7/6 = 4 1/6
3 3/10 + 1/2 = 3 3/10 + 5/10 = 3 8/10 = 3 4/5
7 1/6 - 3 1/5 = 43/6 - 16/5 = 215/30 - 96/30 = 119/30 =39 2/30 =39 1/15
3,7 + 1 2/5 = 3,7+1,4 =5,1
13 1/6 - 5,1 = 79/6 - 51/10 =395/30 - 153/30 = 242/30= 121/15= 8 1/15
