CHRONO

30 s.

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

CHRONO

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