CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
63 + = 65
73 - = 73
71 - = 69
87 + = 93
72 + = 77
20 - = 15
66 + = 68
83 + = 89
47 - = 42
47 - = 45
85 + = 91
32 + = 38
38 + = 43
64 + = 70
21 - = 15
87 - = 84
52 - = 48
49 + = 50
70 + = 74
10 - = 6