漫画数学：古代数学知多少 在线下载 pdf mobi 2025 epub 电子版

“五斗米”有多重？

“千乘之国”的兵马有多少？

“300勇士”到底有多少人？

古代怎么纪年的？

天干地支的数学知识

……

让我们走进历史，探寻数学宝藏吧！

这是一套有趣的数学科普丛书，涉及美食、人体、医学、建筑、物理、军事、交通、古代数学等与数学相关的领域，内容包罗万象，故事生动有趣，是培养孩子数学兴趣和数学思维的绝佳读物。本套丛书运用生动活泼的文字、幽默诙谐的漫画以及贴近生活的例子，将复杂深奥的数学知识化繁为简，让孩子一看就明白，一学就会用！

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在线阅读地址：漫画数学：古代数学知多少在线阅读

在线听书地址：漫画数学：古代数学知多少在线收听

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编辑推荐

根据小学生认知特点量身打造的数学科普丛书。

内容涵盖军事、历史、物理、建筑、人体、饮食、交通等领域。

采用趣味问答形式，让孩子在轻松有趣的阅读氛围中走近数学。

打破数学“刻板”教学印象，启发孩子探索式学习兴趣。

趣味故事中蕴藏数学思维，层层深入引导孩子踏入数学的世界。

书摘插图

• 作者：Arcadiaalice 发布时间：2013-06-29 22:38:45

  从外行人角度看还是蛮有意思的

• 作者：壹° 发布时间：2016-07-26 09:46:22

  规矩只是为了管理方便，但限制不了一心想突破窠臼的人。

• 作者：往夏 发布时间：2021-04-29 09:46:34

  常备工具书

• 作者：咖啡牛奶 发布时间：2020-09-11 14:44:19

  书本身的内容还可以，但这个翻译是机翻的吗？！

• 作者：白小青 发布时间：2013-03-17 17:19:46

  2012.10.1 孕期胎教书哈哈哈

• 作者：黄岛主 发布时间：2017-12-02 17:41:21

  简单的均线交易系统，后验性的，权当入门。

• What is reasonableness?

  作者：Jiong 发布时间：2006-12-11 11:05:47

  Link:

  http://jiong.wykehamist.com/blog/2006/12/what-is-reasonableness.html

  剑桥面试的时候，那个教授不断强调的一个词，是段法律条文中的“reasonable”。在John Finnis的Natural Law and Natural Rights里面，作者不断强调的一个关键词，也是“practical reasonableness”。Finnis指出，英美普通法系里头，没有什么“自然法”，所谓的natural law，讲到底就是人们的那点实用理性，那点合理性。

  当初最吸引我的，也就是法律的这点reasonableness。reasonableness不仅仅是理性，还要合理，以人为标准，不钻牛角尖。什么是合理？合理就是不要上纲上线，动不动就有些东西是什么与生俱来的，老天给的，100%不可侵犯的。Finnis的这本书，就是从合理的、以人为本的角度出发，阐释法律、公民权利和社会秩序的益处，而不是用一些诸如“天赋人权”之类的空洞口号，来捍卫一些所谓的普世价值观。

  Finnis 显然是受到了亚里士多德的巨大影响，认为每个人都拥有不同的自我价值，以及实现这些异同价值的方式。全书也是由此展开的：作者首先遵循英美经验主义哲学家们的传统，重点阐释了什么是“self-evident”、什么是“intrinsic good”，这些无法证明、或者不证自明的基本价值。要维护这些价值，不可忽略的是人的社会性；要保证一个由人所组成的群体，为了实现其成员各自的自我价值实现，需要维护“共同的善”（common good），这就需要一种“威权”（authority）。权力并不必然就是坏的，是需要防范的——真是如此，我们就不需要政府、更不要现代化了；中国古代的小农经济、农业社会，才是美国开国元勋们当初所向往的天堂之国啊！回到过去不就好了？

  事实上，之所以有政府的诞生，之所以随着现代社会的越趋复杂，政府职能也在不断扩大，原因也正在于，这样一种权力的集中，根本上是有益的。当然一个随之产生的问题，使如何协调公共权力与个人权利、组织与个体的关系——这是全书的主题，但也更是所有社会永恒的主题。

• Why We Get Up in the Morning

  作者：linj 发布时间：2018-08-16 17:42:17

  I just finished reading the book “My Morning Routine”. It was suggested by a WeChat channel I follow and the topic certainly sounds like one I’d be interested in. It’s a collection of interviews about the morning routines of some successful people. You shouldn’t expect too much - I didn’t, but it can be inspirational, to a limited extent. Unfortunately I’m a very slow reader, thus it doesn’t seem worth my long reading time.

  I decided to write something about the book while in the middle of the read. At first, I was thinking about a summary. But then I was captured by this idea of why people get up in the morning, at all. What brings us to rise every day and to sleep every night. I realized it’s not the morning routine that’s important, but the day you are going to spend. If you want to achieve something during the day, naturally gradually you develop habits around it to help you do that. Whatever the something is and whatever the habits are.

  Back to the book:

  - Most of the interviewees don’t have a 9 to 5 job as most people do. Their morning routines are surely informative but can be unrelatable as well. Better focus on the takeaways.

  - The content is highly repetitive. It turns out there are only so many flavors for the morning routine.

  Building blocks of the morning routine (almost inevitably you must get up early):

  - Read a book: a real, honest-to-God book as the first interviewee in the book put it, often non-fiction and/or non-work related

  - Workout

  - Home: yoga, body weight training (push up, plank, stretch)

  - Out: run, walk (with partner, with dog, or alone)

  - Gym

  - Swimming

  - Meditate

  - Drink, eat

  - Check news, social media, emails

  Copy, or move, your morning routine to night and it becomes your night routine, if you prefer that.

  To make your falling asleep and carrying out morning routine easier, follow these

  tips

  before bed:

  - Make a list of to-dos and get them out of mind.

  - Lay out the clothes you are to wear for the next day; if you workout in the morning, lay out the sportswear too.

  - Leave your phone alone.

  A key idea worth noting is to reduce

  decision fatigue

  . Laying out clothes beforehand, having simple, even same breakfast and so on all help maintain your limited willpower for your main focus.

  Other dos and don’ts:

  - Don’t snooze. The reason is straightforward, but you do what you please.

  - Don’t dive into your phone first thing you wake up.

  - Making bed is a good practice to mark the start of your morning.

  This is a brief look into what is going on in the book and about the morning routine. Details are lost. If you are interested, go read the book. But like so many books out there, it has chapters that are variations of the same theme over and over again. Put it down wherever you start to get bored and you wouldn’t miss much.

  What seems more interesting to me,

  rather than morning routines, is what these successful people do, for a living. They are founder and CEOs of this and that; they are writer, artist, designer, photographer, musician; president, professor, general, athlete. You can be successful in many ways, but it almost always involves a business of your own, may it be a company, a website, a community to run or a writing project, a concert tour. In fact, it's not even about the business. It’s about the time. You are the boss of your time. Now you’ve got the whole day in your hand to plan. You must self-impose a structure to it. And if you push more, not necessarily more tasks but certainly more efficiency, into your day, hopefully you achieve more. That’s why morning routine is helpful to these successful people. Nevertheless, you don’t have to be a freelancer or a founder of anything to own your time. If you like your 9 to 5 job and willingly put your time in it, that’s good enough.

  Unfortunately not everyone can say they like their job. Accept it or change it, easier said than done. So every weekday morning they sleep to the last minute to catch the bus and return home physically and emotionally drained, incapable of doing anything but lying down and watching TV shows. Weekends are for more sleeping, more lying in bed with phones. After all, what’s the point of preparing yourself for a job, or a life actually, you don’t care about or even hate? In the worst case, as anyone who has experienced depression can testify, the first big challenge of the day is to get up. Why bother?

  Why do people get up in the morning at all?

  Isn’t it because we believe good things will happen and we are here to make them happen. We get up because we want to achieve something and there indeed is something for us to achieve. If you are in a bad position right now, accept it or change it - eventually you will do either. I say try changing it. And morning routine, or night routine if you wish, is a great start point to take control of life. It can be one thing you look forward to for the coming new day. It can be the small step you take to better yourself for the challenges in life.

  I had my best morning routine while I was out of a job. Unsurprising. That’s when I had all my time at my disposal. I got up early, had a small bowl of oatmeal, workout for an hour, took a shower and then ate a full breakfast. It’s kind of for nothing, because I wasn’t doing anything during the day except reading constantly. But it’s the morning routine that injected discipline into those days. That, and to eat and sleep regularly. Together they guarded the bottom line so one day didn’t get mixed with the other to be a long vague period of time and I felt refreshed most of the days.

  Now with a job, I keep my morning simple. It’s a 20 minute walk from home to office. And I move workout to night. Sometimes I miss it, and I don’t punish myself for that. I’ll try again tomorrow. What’s more important is to hold on to the habit and keep the rhythm going. Finally, as you can tell, I still read.

  Here is my one takeaway from the book. With or without a certain routine, better be proactive in life. The sun rises. Get out of bed. Make moves. We’ll see where it goes.