...blok 3 contractwerk.gif hoofdrekenen... oefening 20

Voorbeeld: 50 x 62 = ( 5 x 62 ) x 10 = 310 x 10 = 3100
50 x 41 = ( x 41 ) x = x =
50 x 18 = ( x 18 ) x = x =
50 x 23 = ( x 23 ) x = x =
50 x 125 = ( x 125 ) x = x =
50 x 204 = ( x 204 ) x = x =