CHRONO

10 s.

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

CHRONO

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