...blok 1 contractwerk.gif hoofdrekenen... oefening 20

20 x 200 =
374 + 56 =
4 x 9 =
204 - 7 =
6 x 60 =
330 - 80 =
60 x 80 =
35 : 7 =
400 - 16 =
521 - 30 =