CHRONO

10 s.

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

CHRONO

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