CHRONO

2 s.

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

CHRONO

0 s.
6 + 3 + = 12
6 + 3 + = 14
3 + 5 + = 16
6 + 1 + = 11
8 + 1 + = 16
2 + 2 + = 10
1 + 9 + = 15
2 + 4 + = 13
2 + 5 + = 11
2 + 3 + = 14
4 + 2 + = 9
5 + 8 + = 17
8 + 4 + = 16
3 + 8 + = 17
7 + 6 + = 14
3 + 5 + = 13
5 + 8 + = 14
3 + 5 + = 12
9 + 5 + = 15
1 + 5 + = 13