文件名称：Secrets of Mental Math 心算的秘密
文件大小：1.53MB
文件格式：PDF
更新时间：2012-08-08 03:33:06
数学 心算
英语的，可以了解了解，让脑瓜更灵活 Mental Addition and Subtraction Basic Multiplication Intermediate Multiplication Mental Division The Art of “Guesstimation” Pencil-and-Paper Math Memorizing Numbers Advanced Multiplication The Art of Mathematical Magic How Math Helps Us Think About Weird Things