...blok 1 contractwerk.gif hoofdrekenen... oefening 8

605 - 30 =
750 - 40 =
830 - 50 =
421 - 20 =
742 - 60 =
420 - 70 =
123 - 40 =
1 006 - 10 =
408 - 20 =
925 - 50 =