CHRONO

10 s.

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

CHRONO

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