101 math shortcuts
DESCRIPTION
math tricksTRANSCRIPT
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FrontPrefaceContentsIntroductionChapter 1Chapter 2Chapter 3Chapter 4Chapter 5Postscript
DESCRIPTION
math tricksTRANSCRIPT
FrontPrefaceContentsIntroductionChapter 1Chapter 2Chapter 3Chapter 4Chapter 5Postscript