Oef  3

Gegeven:

__l___l___l___l___l___l___l___l___l___l___l___l___l___l___l__Z

    b                 a                   0         1                                                       

Gevraagd: Vul in met < of >

                       l a l  <  l b l

                       l a l  <   - b

                       - a   <   - b

                         a   <   l b l