CHRONO

10 s.

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

CHRONO

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