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Mencal-数学心算技巧,速算口诀

军 曹 · Education · 13.5y old

$3 · Paid
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4.7★

401 ratings

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About

Mencal是一款帮助你系统学习速算技巧,提高心算能力的应用。应用系统地介绍了加、减、乘、除和平方的运算技巧,让你不用计算器和草稿也可以快速准确的计算出多位数乘法和平方的结果。熟练掌握Mencal的技巧足以让你拥有让普通人乍舌的心算能力。 Arthur Benjamin关于心算的TED演讲: A performance of "Mathemagic" http://www.ted.com/talks/arthur_benjamin_does_mathemagic 示例: 十位相同,个位互补的两位数乘积(互补:两个数相加为10,100,1000...) 38 × 32 = 1216 ①: 十位数先加1,再与该十位数相乘 ( 3 + 1 ) × 3 = 12 ②: 将两个数的个位数相乘(如果结果小于10,则在前面添一个0) 8 × 2 = 16 ③: 将第②步的结果接到第①步所得结果之后 12←16=1216 • 功能特性: - 卡片式设计,一页一算法,可以充分利用你的碎片时间 - 每个课程都搭配对应的练习,通过训练熟能生巧 - 加星标注不熟悉的课程,方

Released
Apr 26, 2013
Category
Education
Content rating
4+
Price
$3
In-app purchases
No
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