CHRONO

10 s.

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

CHRONO

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