CHRONO

10 s.

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

CHRONO

0 s.
8 + 3 + = 13
8 + 6 + = 18
4 + 6 + = 12
3 + 6 + = 18
1 + 1 + = 3
7 + 2 + = 13
5 + 3 + = 11
5 + 7 + = 15
1 + 7 + = 10
2 + 9 + = 20
9 + 4 + = 19
7 + 2 + = 12
5 + 2 + = 12
1 + 2 + = 9
3 + 7 + = 15
7 + 7 + = 20
4 + 9 + = 19
9 + 2 + = 17
1 + 7 + = 14
3 + 4 + = 16