20 |
19 |
|
|
16 |
|
14 |
0 |
|
2 |
3 |
|
5 |
|
4+=6
2+=10
6+=9
2+3= 4+3= 9-6= 10-8=
7-4= 11+2= 15-3= 8-4=
15+3= 9-4= 10-5= 18-6=
3+3= 10-9= 17+2= 2+2=