计算9+99+999+9999+99999
7+2= 2+5= 12+5=11+1= 7+3= 12+1=
5+2= 5+4= 15+1=11+5= 5+5= 12+3=
12+4= 12+7= 11+4=12+3= 16+2= 11+6=
13+5= 14+4=
11+6= 12+6= 13+6= 12+7= 13+2= 14+5=