CHRONO

34 s.

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

CHRONO

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