Pose et effectue les soustractions suivantes.

145 - 63 =                                              609 - 578 =

1 227 - 1 084 =                                      428 - 95 =

407 - 121 =                                            785 - 397 =

3 283 - 270 =                                      6 205 - 4 127 =

35 - 8,91 =                                          12,52 - 7,37 =

40 - 15,25 =                                           100 - 28,48 =

84 - 62,75 =                                           225 - 113,95 =

17 - 0,83 =                                                 4 - 0,75 =        

50 - 0,68 =                                            20,5 - 0,47 =        

32 - 0,89 =                                              2,5 - 0,71 =