CHRONO

10 s.

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

CHRONO

0 s.
7 + 9 + = 18
4 + 2 + = 14
8 + 7 + = 18
1 + 5 + = 13
1 + 2 + = 11
1 + 1 + = 10
9 + 2 + = 18
1 + 2 + = 9
3 + 6 + = 10
4 + 1 + = 9
1 + 8 + = 12
2 + 1 + = 8
3 + 5 + = 10
2 + 4 + = 7
3 + 9 + = 17
8 + 4 + = 14
6 + 1 + = 12
4 + 8 + = 15
8 + 2 + = 18
9 + 2 + = 17