CHRONO

10 s.

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

CHRONO

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