CHRONO

10 s.

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

CHRONO

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