CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
83 + = 87
94 + = 99
89 + = 93
64 + = 64
93 - = 93
20 - = 19
15 + = 15
32 + = 34
31 - = 26
59 - = 56
21 + = 22
77 - = 72
85 + = 85
34 - = 30
82 - = 77
94 + = 97
7 - = 3
92 + = 93
86 + = 86
40 - = 35