Speed mathematics : secret skills for quick calculation
Handley, 1943-
Speed mathematics : secret skills for quick calculation / Bill Handley. - Hoboken John Wiley & Sons 2003. - xiii, 256p. 23cm
0471467316
Mental arithmetic
513.9 HAN 2000
Speed mathematics : secret skills for quick calculation / Bill Handley. - Hoboken John Wiley & Sons 2003. - xiii, 256p. 23cm
0471467316
Mental arithmetic
513.9 HAN 2000