CHRONO

10 s.

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

CHRONO

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