CHRONO

34 s.

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

CHRONO

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