CHRONO

10 s.

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

CHRONO

0 s.
3 + 3 + = 11
4 + 7 + = 15
1 + 1 + = 11
1 + 1 + = 6
1 + 9 + = 17
5 + 4 + = 12
1 + 6 + = 9
9 + 3 + = 19
4 + 4 + = 9
7 + 6 + = 18
4 + 1 + = 6
1 + 4 + = 6
3 + 1 + = 5
4 + 7 + = 14
8 + 8 + = 20
3 + 4 + = 8
4 + 1 + = 12
3 + 1 + = 13
5 + 7 + = 13
6 + 8 + = 19