Question

Cate 20 de adunări si scăderi fara trecere peste ordin in concentric 0-31

Answer 1

5-3=2
10-7=3
8-8=0
4-1=3
5-4=1
1-0=1
9-8=1
0-0=0
9-6=3
9-5=4

1+6+3=10
3+5=8
4+4=8
2+1=3
3+5+2=10
9+1=10
8+1=9
7+1+2=10
4+3=7
5+2=7