Speed Mathematics: Secret Skills for Quick Calculation
by Bill Handley
ISBN 13: 9780471467311
Format: Paperback (272 pages) Publisher: Jossey Bass Published: 07 Nov 2003
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Speed Mathematics : Secrets of Lightning Mental Calculation
ISBN 13: 9780701637651
Format: Paperback Publisher: John Wiley
Speed Math for Kids: The Fast, Fun Way to Do Basic Calculations
ISBN 13: 9780787988630
Format: Illustrated (256 pages) Publisher: Jossey-Bass Published: 01 Mar 2007