CHRONO

10 s.

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

CHRONO

0 s.
4 + 1 + = 8
8 + 2 + = 19
2 + 6 + = 12
4 + 2 + = 9
8 + 7 + = 17
1 + 1 + = 5
6 + 3 + = 15
1 + 2 + = 10
8 + 1 + = 17
1 + 5 + = 10
1 + 7 + = 17
1 + 3 + = 11
5 + 6 + = 18
6 + 8 + = 16
1 + 5 + = 15
4 + 4 + = 15
2 + 8 + = 18
7 + 6 + = 18
7 + 5 + = 14
7 + 1 + = 9