CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
45 + = 46
51 + = 57
59 + = 59
41 + = 47
26 - = 25
36 - = 32
95 - = 91
51 - = 48
50 + = 53
12 - = 7
27 + = 33
40 - = 37
22 - = 16
3 + = 5
9 + = 9
13 + = 15
46 + = 48
38 + = 44
83 - = 78
77 - = 73