CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
39 - = 33
25 + = 29
43 + = 48
86 - = 83
45 + = 45
55 + = 59
36 - = 34
22 - = 16
40 - = 38
75 + = 77
16 - = 15
63 + = 67
46 - = 42
51 - = 46
96 - = 96
41 + = 43
3 + = 9
14 + = 18
59 + = 59
83 + = 83