12-9= 11-9= 19-9=
7+=16 4+=13 3+=12
14-9= 15-9= 17-9=
-9=
13-94 15-95 14-94
19-99 12-911-9 18-917-9
11-9= 12-9= 16-9=
2+9= 3+9= 7+9=
11-9=1+ 13-9=3+
14-9-5= 18-9-1=
(个)