CHRONO

24 s.

Additions et soustractions à trous.

CHRONO

0 s.
10 + = 11
89 - = 89
17 + = 20
99 - = 98
81 - = 80
84 + = 89
36 - = 30
29 - = 29
44 - = 44
71 + = 75
59 + = 59
76 + = 80
85 + = 85
74 - = 69
56 - = 51
10 + = 15
61 + = 62
32 - = 26
1 + = 7
86 - = 81