(个)
13-106 4+812 15-311 6+54+7
189+7 19-710 9-57 17-46+8
0+10= 8-8= 10+9= 6+5=
6+3= 8+7= 7+2= 9+9=
3+7+5= 8+2+6= 8-8+9=
5+9-4= 16-2+4= 6+8-3=