CHRONO

2 s.

Additions et soustractions à trous.

CHRONO

0 s.
32 - = 31
77 + = 78
89 + = 89
92 - = 91
24 - = 18
26 + = 31
28 - = 24
82 - = 81
64 + = 68
57 + = 63
3 + = 7
15 - = 12
13 + = 16
26 + = 26
41 + = 41
74 - = 71
87 + = 91
67 + = 67
31 + = 35
63 - = 61