CHRONO

24 s.

Additions et soustractions à trous.

CHRONO

0 s.
54 + = 58
39 - = 39
14 - = 11
69 - = 68
37 + = 40
86 + = 86
13 - = 12
81 - = 76
72 - = 67
19 + = 22
97 - = 94
46 + = 46
74 + = 79
84 - = 84
78 - = 75
81 - = 78
74 - = 74
49 - = 44
55 + = 59
42 + = 43