(个)
1+9=
2+7=
10-10=
13-0=
17+2=
18-3=
14-4=
11+3=
6+0+4=
16-1-2=
9+5-3=
15-5+2=
□○□=□(个)
5+28 49-5 2+33+2 69-2
6+13-2 3+59-2 5+47-2 2+27-3
10-29 66+0 5-12+3 6+310-4