•     Speed Mathematics - Secret Skills for Quick Calculation{h33t}{raththaran}

• 大小:

  57.08 MB

  时间:

  2010-07-20

•     Wolfram Research Calculation Center v2.0

• 大小:

  31.64 MB

  时间:

  2010-02-16

•     Secrets of Mental Math The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks [StarDiwa]

• 大小:

  871.1 KB

  时间:

  2015-02-14