...blok 1 contractwerk.gif hoofdrekenen... oefening 19

3 x 8 =
6 x 30 =
302 - 8 =
40 x 40 =
156 + 34 =
28 : 4 =
1 000 - 9 =
7 x 50 :
418 - 60 =
50 x 300 =