CHRONO

10 s.

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

CHRONO

0 s.
8 + 1 + = 10
1 + 4 + = 10
3 + 6 + = 17
1 + 7 + = 16
3 + 8 + = 20
4 + 4 + = 16
9 + 5 + = 18
5 + 6 + = 17
6 + 8 + = 17
2 + 4 + = 15
4 + 8 + = 15
7 + 4 + = 12
2 + 2 + = 5
3 + 3 + = 12
8 + 5 + = 19
1 + 5 + = 12
3 + 8 + = 13
7 + 2 + = 11
1 + 7 + = 9
3 + 9 + = 19