CHRONO

55 s.

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

CHRONO

0 s.
4 + 8 + = 20
4 + 5 + = 10
4 + 7 + = 20
3 + 9 + = 19
8 + 9 + = 18
1 + 5 + = 13
4 + 3 + = 15
2 + 5 + = 14
2 + 9 + = 12
3 + 9 + = 14
2 + 6 + = 10
9 + 2 + = 16
4 + 2 + = 9
5 + 8 + = 16
7 + 9 + = 18
6 + 8 + = 15
3 + 8 + = 16
4 + 4 + = 11
3 + 6 + = 15
9 + 1 + = 17