1 2 3
3 4 5
5 6 7
7 8 9
>>>>
53 01 3+11+2 2+25-3
42 31 5-13-0 2-25-5
5-3= 4-4= 0+2= 2+3=
1+1= 5-2= 4-3= 5-0=
4+1= 0+3= 2+2= 5-1=
(个)