15-8= 12+5= 18-4= 14+4=
11-2= 13+6= 17-8= 16+3=
19-6= 10+7= 14-5= 18+1=
12+8= 15-9= 11+3= 17-5=
16+4= 19-7= 13+5= 12-3=
18-2= 14+6= 10-4= 15+2=
17-6= 13+4= 18-9= 10+5=
12-4= 16+3= 19-8= 14-2=
15+7= 11-6= 17-7= 13+3=
14-6= 18+2= 12+4= 19-3=
拿起坑娃吧，哈哈哈！