CHRONO

300 s.

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

CHRONO

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