6+4= 15-10= 12+7= 13+5-4=
16-0= 2+8= 17-4= 16-6+8=
14+0= 8-8= 11+8= 18-4+2=
□○□=□(个)
4-2= 2+2= 6+3= 8-4=
7-2= 4+3= 5-0= 6-5=
9+3= 4+8= 2+9= 6+9=
8+5= 9+9= 8-3= 8+3=
9+7= 5+6= 6-6= 7-5=