CHRONO

10 s.

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

CHRONO

0 s.
5 + 6 + = 12
5 + 7 + = 13
4 + 7 + = 19
5 + 7 + = 15
6 + 6 + = 17
5 + 1 + = 7
1 + 8 + = 16
3 + 3 + = 15
9 + 5 + = 20
1 + 4 + = 14
1 + 5 + = 11
7 + 1 + = 16
6 + 4 + = 14
1 + 6 + = 13
6 + 9 + = 17
3 + 8 + = 20
6 + 1 + = 11
2 + 9 + = 19
9 + 7 + = 17
2 + 2 + = 11