CHRONO

34 s.

Additions à trous (a + b + ? = s <= 20).

CHRONO

0 s.
3 + 6 + = 13
5 + 2 + = 16
1 + 8 + = 15
3 + 6 + = 12
7 + 1 + = 10
2 + 5 + = 9
1 + 7 + = 16
8 + 4 + = 15
2 + 8 + = 13
2 + 7 + = 16
8 + 2 + = 17
4 + 9 + = 17
4 + 1 + = 6
9 + 1 + = 16
8 + 5 + = 14
3 + 6 + = 14
7 + 2 + = 18
5 + 6 + = 13
8 + 1 + = 12
1 + 9 + = 16