CHRONO

10 s.

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

CHRONO

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