CHRONO

10 s.

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

CHRONO

0 s.
1 + 9 + = 17
7 + 4 + = 13
5 + 8 + = 16
7 + 5 + = 16
6 + 1 + = 15
5 + 4 + = 16
7 + 5 + = 19
5 + 4 + = 18
5 + 4 + = 10
8 + 7 + = 19
6 + 3 + = 15
5 + 3 + = 14
8 + 2 + = 17
2 + 2 + = 7
8 + 5 + = 16
1 + 1 + = 10
8 + 9 + = 20
7 + 2 + = 10
2 + 2 + = 11
1 + 5 + = 15