CHRONO

10 s.

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

CHRONO

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