8-5= 9-5= 7-6= 6-1=
4-2= 7-3= 3-2= 7-6=
6-3= 8-4= 9-6= 9-2=
914 66 1017 97
10+49-3 8-43 6-36+3 10+79-6
( )- 6 = 3 ( )- 3 = 4 ( )- 1 = 7
( )- ( ) = 3 ( )- ( ) = 6 ( )- ( ) = 4