...blok 2 contractwerk.gif hoofdrekenen... oefening 5

306 - 7 =
415 + 8 =
946 + 5 =
854 - 5 =
328 + 9 =
911 - 8 =
698 + 4 =
241 - 3 =
355 - 7 =
724 + 6 =