CHRONO

34 s.

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

CHRONO

0 s.
2 + 6 + = 11
2 + 7 + = 11
3 + 7 + = 13
6 + 4 + = 17
4 + 6 + = 11
3 + 7 + = 16
1 + 6 + = 11
7 + 6 + = 15
8 + 2 + = 11
5 + 8 + = 20
3 + 1 + = 6
4 + 1 + = 8
7 + 8 + = 19
5 + 1 + = 11
8 + 9 + = 20
8 + 8 + = 17
2 + 1 + = 7
2 + 1 + = 4
8 + 2 + = 16
2 + 5 + = 14