CHRONO

10 s.

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

CHRONO

0 s.
6 + 8 + = 17
5 + 2 + = 16
5 + 3 + = 12
6 + 3 + = 16
4 + 1 + = 9
5 + 5 + = 13
5 + 3 + = 16
4 + 4 + = 16
2 + 4 + = 15
5 + 3 + = 15
2 + 4 + = 13
3 + 4 + = 13
6 + 9 + = 19
8 + 1 + = 16
2 + 6 + = 10
6 + 6 + = 15
5 + 2 + = 14
8 + 2 + = 11
1 + 2 + = 5
6 + 3 + = 11