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Speed mathematics: : secrets of lightening mental calculation Handley, Bill.

Edition: Third Edition.Publisher: Wrightbook, ; 2008Availability: Items available for loan: Sibalom [Call number: 513.9 H19s 2008] (1).

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Teaching number : advancing children's skills and strategies Robert J. Wright ... [et al.].

Publisher: Paul Chapman Pub., ; 2002Availability: Items available for loan: Sibalom [Call number: 510.371 W93t 2002] (1).

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