CHRONO

10 s.

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

CHRONO

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