CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
23 - = 20
4 + = 8
78 + = 84
78 - = 76
61 - = 55
15 + = 20
63 + = 69
77 + = 80
94 + = 96
13 - = 12
2 + = 8
73 - = 69
7 - = 5
60 + = 65
98 - = 92
85 - = 83
63 + = 67
92 + = 96
40 + = 45
11 + = 14