CHRONO

10 s.

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

CHRONO

0 s.
5 + 6 + = 19
2 + 1 + = 9
3 + 8 + = 19
5 + 4 + = 11
9 + 1 + = 16
9 + 4 + = 18
4 + 4 + = 13
4 + 6 + = 17
7 + 7 + = 15
7 + 5 + = 20
1 + 3 + = 7
2 + 9 + = 12
7 + 2 + = 12
5 + 7 + = 19
9 + 1 + = 14
2 + 6 + = 11
1 + 3 + = 10
6 + 7 + = 14
3 + 8 + = 12
4 + 3 + = 15