CHRONO

55 s.

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

CHRONO

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