CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
70 - = 67
76 + = 82
79 - = 75
39 - = 36
91 + = 96
28 - = 24
83 + = 89
20 + = 26
24 + = 28
38 - = 37
26 - = 26
87 - = 82
84 + = 84
66 + = 66
36 + = 42
16 + = 17
88 - = 87
92 + = 98
14 + = 19
67 + = 69