00357 a2200145 4500 0749260017 515 OPE 8575 11859 The Open University Living with technology block 3 numeracy Keynes The Open University 1989 1994 36p. 30cm Analysis L 37219 37219 0 0 0 0 LEN MAIN MAIN LEN 2008-10-08 0 515OPE 3474 2008-10-08 00:00:00 0.00 2016-10-31 L