12-8= | 13-5= | 10+9= | 14-5= |
18-9= | 5+8= | 12-3= | 15-6= |
13-8= | 17-9= | 14-7= | 16-8= |
16-7= | 18-9= | 15-8= | 16-6= |
10-3= | 11-2= | 9+6= | 6+8= |
5+8= | 7+9= | 8+8= | 7+6= |
原有 | 借出 | 还剩 | |
18个 | 9个 | 个 | |
15根 | 根 | 7根 | |
副 | 4副 | 8副 | |
17个 | 个 | 8个 |
15-5= | 18-8= | 9+9= | 17-6= |
7+8= | 13-2= | 14-3= | 16-10= |
19-2= | 12-2= | 16-2= | 6+6= |
10-8= | 10-2= | 9+8= | 5+7= |
13+4= | 6+8= | 15-6= | 14-8= | 18-4-4= |
10+3= | 9+9= | 13-9= | 5+6= | 14-7+5= |