CHRONO

10 s.

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

CHRONO

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