12-7= 13-9= 19-8=

14-8= 15-8= 14-9=

13-6= 14-6= 13-7=

15-4= 17-5= 14-7=

13-5= 12-5= 13-4=

12-8= 15-6= 16-9=

15-7= 17-9= 17-8=

16-8= 12-6= 14-5=

12-9= 15-9= 16-7=

11-5= 17-6= 19-0=

我用了_______________分_______________秒,對_______________道,錯_______________道。

11-5= 13-5= 15-6=

11-6= 13-6= 15-7=

11-7= 13-7= 15-8=

11-8= 13-8= 15-9=

11-9= 13-9= 16-7=

12-4= 14-5= 16-8=

12-5= 14-6= 16-9=

12-6= 14-7= 17-8=

12-7= 14-8= 17-9=

12-8= 14-9= 18-9=

我用了_______________分_______________秒,對_______________道,錯_______________道。

7+6= 3+8= 7+7=

8-5= 4+9= 8+8=

14-6= 14-9= 9+9=

18-9= 13-5= 4+6=

9+5= 4+8= 5+9=

8+3= 14-7= 6+7=

12-7= 15-8= 14-5=

16-8= 15-9= 12-9=

2+9= 6+9= 17-8=

12-5= 6+5= 13-7=

我用了_______________分_______________秒,對_______________道,錯_______________道。

18+0= 3+7= 6+4=

5+8= 4+9= 7+6=

16-8= 14-5= 9+5=

2+9= 13-9= 8+3=

15-6= 12-6= 4+3=

3+9= 11-8= 11-9=

14-7= 6+7= 13-8=

9+4= 4+8= 17-8=

13-7= 5+9= 18-9=

15-8= 6+9= 11-1=

我用了_______________分_______________秒,對_______________道,錯_______________道。

12-7= 13-9= 19-8=

14-8= 15-8= 14-9=

13-6= 14-6= 13-7=

15-4= 17-5= 14-7=

13-5= 12-5= 13-4=

12-8= 15-6= 16-9=

15-7= 17-9= 17-8=

16-8= 12-6= 14-5=

12-9= 15-9= 16-7=

11-5= 17-6= 19-0=

我用了_______________分_______________秒,對_______________道,錯_______________道。

11-5= 13-5= 15-6=