CHRONO

27 s.

Additions et soustractions à trous.

CHRONO

0 s.
75 + = 79
8 - = 8
76 - = 72
50 - = 47
35 - = 31
20 + = 21
25 + = 30
5 - = 0
30 - = 27
16 + = 17
96 - = 91
86 + = 88
82 + = 83
78 - = 75
91 + = 91
55 - = 53
27 + = 32
21 - = 19
56 - = 56
83 - = 82