CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
71 + = 71
34 + = 39
7 + = 10
3 + = 5
29 - = 25
54 + = 60
21 + = 22
75 + = 78
18 - = 18
50 - = 44
53 - = 52
90 - = 88
33 - = 29
45 - = 42
85 + = 85
54 + = 58
83 + = 87
48 + = 50
91 + = 96
52 + = 55