CHRONO

10 s.

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

CHRONO

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