CHRONO

10 s.

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

CHRONO

0 s.
4 + 5 + = 14
9 + 7 + = 19
1 + 1 + = 10
4 + 3 + = 11
2 + 1 + = 5
4 + 4 + = 14
2 + 7 + = 13
7 + 3 + = 18
7 + 6 + = 17
8 + 7 + = 20
1 + 4 + = 11
7 + 3 + = 19
2 + 9 + = 16
8 + 2 + = 18
7 + 4 + = 14
3 + 6 + = 12
6 + 2 + = 11
1 + 1 + = 3
6 + 9 + = 19
1 + 5 + = 15