5+11=

9+10=

20-3=

12-1=

20-7=

15-9=

12-6=

12+2=

0+14=

20-11=

17-6=

17+2=

11-10=

8+7=

12-3=

17+1=

5+15=

11-9=

19-11=

20-20=

15-15=

12-8=

19-18=

20-18=

0+13=

18-5=

4+10=

17-1=

11-7=

11-9=

19-18=

15-13=

6+12=

17-6=

11-9=

11-3=

17-9=

11+0=

0+20=

1+15=

5+13=

18-12=

10+9=

0+13=

12-6=

11-10=

19+1=

13-12=

12-5=

1+13=