CHRONO

10 s.

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

CHRONO

0 s.
5 + 6 + = 15
5 + 5 + = 17
6 + 4 + = 14
6 + 7 + = 19
6 + 2 + = 11
3 + 9 + = 20
9 + 1 + = 17
4 + 2 + = 9
4 + 5 + = 18
1 + 7 + = 15
6 + 1 + = 15
8 + 5 + = 16
9 + 2 + = 12
2 + 8 + = 13
5 + 6 + = 18
7 + 2 + = 17
5 + 7 + = 13
1 + 5 + = 8
1 + 9 + = 18
6 + 3 + = 15