...blok 1 contractwerk.gif hoofdrekenen... oefening 5

40 - 1 =
80 - 7 =
300 - 1 =
700 - 6 =
20 - 5 =
270 - 2 =
800 - 8 =
650 - 4 =
1 500 - 3 =
930 - 9 =