CHRONO

10 s.

Additions et soustractions à trous.

CHRONO

0 s.
40 - = 37
37 - = 32
21 + = 25
29 - = 26
42 - = 40
48 - = 44
33 - = 32
26 - = 22
85 + = 90
76 - = 72
88 - = 87
32 + = 37
14 - = 12
21 - = 21
65 - = 63
95 + = 96
75 + = 75
21 + = 24
43 - = 43
89 + = 89