CHRONO

10 s.

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

CHRONO

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