全整数约束条件

数学英语 40 How to Divide Fractions

by Jason Marshall A few months ago we talked about how to multiply fractions. Now that were comfortable doing this and weve talked about a few applications of multiplying fractions such as how to convert units and how to estimate how fast someone is

发表于:2018-12-07 / 阅读(48) / 评论(0)

数学英语

数学英语 41 What are Statistics and Estimators?

by Jason Marshall Sometimes statistics* seems magical. Of course, there isnt really anything magical going onbut the fact that statistical methods can be used to pull useful information out of a hatful of messy data is, at a minimum, remarkable. And,

发表于:2018-12-07 / 阅读(62) / 评论(0)

数学英语

数学英语 34 How to Multiply Fractions

by Jason Marshall In the last article, Is Multiplication Repeated Addition? we talked about what it really means to multiply two numbers. We found that the conventional meaning of multiplicationrepeated additionbreaks down when multiplying fractions,

发表于:2018-12-07 / 阅读(46) / 评论(0)

数学英语

数学英语 17 What Are Fractions?

图片1 图片2 by Jason Marshall Do you frequently find yourself at restaurants with friends fumbling to figure out how to split the bill and calculate the tip? Have you ever resorted to seeking advice from your smart phone? Dont worry, we all have.

发表于:2019-01-02 / 阅读(120) / 评论(0)

数学英语

关于作文的技巧(2)

II．现象法对某种社会现象、倾向或社会问题进行剖析的文章往往在文章一开始首先引出这种现象或问题，然后评论。本节句型就适用于这种开头。 11 Recently the rise in phenomenon of problem of ques

发表于:2019-02-09 / 阅读(30) / 评论(0)

英语学习方法

经济学人321:世界银行亟待重整

Finance and economics 财经商业 Reforming the World Bank 世界银行，亟待重整 Zen and the art of poverty reduction 禅宗思想及扶贫艺术 Calm and confusion at the world's biggest development institution 世界最大发展机构平静与

发表于:2019-02-18 / 阅读(30) / 评论(0)

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