CHRONO

10 s.

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

CHRONO

0 s.
2 + 4 + = 12
1 + 9 + = 17
5 + 4 + = 16
4 + 3 + = 16
5 + 6 + = 19
6 + 1 + = 14
3 + 1 + = 7
1 + 4 + = 6
2 + 3 + = 13
4 + 1 + = 8
5 + 2 + = 8
5 + 2 + = 13
4 + 8 + = 17
7 + 4 + = 19
7 + 2 + = 11
3 + 6 + = 14
3 + 7 + = 12
6 + 9 + = 18
2 + 2 + = 7
5 + 1 + = 14