CHRONO

2 s.

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

CHRONO

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