...blok 2 contractwerk.gif hoofdrekenen... oefening 17

16 + 6 + 3 =
72 + 18 + 9 =
39 + 8 + 12 =
46 + 16 + 6 =
33 + 30 + 5 =
(74 - 14) - 6 =
(101 - 10) - 1 =
65 - (16 - 8) =
(661 - 51) - 9 =
160 - (41 - 6) =