CHRONO

55 s.

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

CHRONO

0 s.
1 + 8 + = 14
8 + 5 + = 15
5 + 5 + = 15
1 + 5 + = 9
7 + 2 + = 11
6 + 3 + = 15
2 + 4 + = 15
2 + 6 + = 9
6 + 6 + = 17
2 + 7 + = 18
2 + 3 + = 8
8 + 9 + = 20
9 + 2 + = 20
6 + 4 + = 13
1 + 9 + = 19
6 + 8 + = 16
7 + 6 + = 18
5 + 5 + = 11
4 + 9 + = 20
2 + 6 + = 11