CHRONO

10 s.

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

CHRONO

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