CHRONO

10 s.

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

CHRONO

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