CHRONO

10 s.

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

CHRONO

0 s.
4 + 3 + = 8
4 + 7 + = 20
9 + 3 + = 17
2 + 3 + = 10
4 + 2 + = 8
3 + 6 + = 12
3 + 9 + = 14
3 + 8 + = 15
3 + 7 + = 11
6 + 4 + = 14
8 + 4 + = 16
6 + 7 + = 18
1 + 9 + = 19
3 + 1 + = 5
8 + 4 + = 20
5 + 5 + = 14
1 + 1 + = 8
5 + 7 + = 19
1 + 6 + = 15
4 + 4 + = 16