...blok 2 contractwerk.gif hoofdrekenen... oefening 7

24 + 36 =
6 x 24 =
135 + 85 =
12 x 18 =
105 + 75 =
16 x 14 =
516 + 44 =
15 x 24 =
804 + 66 =
18 x 13 =