CHRONO

10 s.

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

CHRONO

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