13+6= | 12+8= | 7+( )=11 | 14+5-8 |
7+8= | 20-7= | ( )+3=20 | 7-5+9= |
15-6= | 8+9= | 16-( )=10 | 19-6-9= |
18-3= | 16-8= | 8=( )-8 | 15-7+5= |
5+9= | 14-7= | ( )-6=13 | 17-3-6= |
12-8= | 6+8= | 5+7= | 16-2= |
16-9= | 14-4= | 11-7= | 9+7= |
5+9= | 17-8= | 6+6= | 14+4= |
12-5= | 11-8= | 7+5= | 6+7= |
13-4= | 16-9= | 15-7= | 17-8= |
5+8= | 6+8= | 8+8= | 14-6= |
11-3= | 13-8= | 14-6= | 11-2+6= | 4+8-6= |
13-3= | 18-9= | 12-7= | 12-5-3= | 8+7-9= |
7+<12 18->9 +9<13
3+9=+6=+8
5+7= | 14-7= | 6+8= | 9+8= |
13-8= | 19-9= | 3+9= | 18-9= |
问题:
15-7= | 4+9= | 12-6= | 17-8= |
14-4= | 8+9= | 11-5= | 16-7= |
16-8= | 5+6= | 14-9= | 13-5= |
15-7= | 6+7= | 10-3= | 5+9= |