16 3/13- 6 8/13=
10 7/16- 4 12/16=
(20 16/25+ 13 9/25)-(23 4/14+7 13/14)=

1) 16 3/13 - 6 8/13= 15 16/13 - 6 8/13=9 8/132) 10 7/16 - 4 12/16 = 9 23/16 - 4 12/16 = 5 11/163) (20 16/25 + 13 9/25)-(23 4/14 + 7 13/14)= 33 25/25 - 30 17/14=34-31 3/14=33 14/14 - 31 3/14=2 11/14