CHRONO

10 s.

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

CHRONO

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