...blok 1 contractwerk.gif hoofdrekenen... oefening 13

20 x 60 =
30 x 400 =
40 x 150 =
60 x 30 =
70 x 800 =
20 x 250 =
90 x 40 =
80 x 600 =
30 x 450 =
700 x 50 =