CHRONO

300 s.

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

CHRONO

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