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  • 數學英語 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,...

  • 數學英語 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...

  • 數學英語 39 What Do Prefixes Mean in Math? - Part 2

    by Jason Marshall A few weeks ago, we began talking about the meaning of prefixes in math. In particular, we talked about the prefixes used in the metric system to represent lengths smaller than one meter. Today, were going to continue this topic by...

  • 數學英語 38 What Do Prefixes Mean in Math? - Part 1

    by Jason Marshall We use a lot of math words in our day-to-day lives without really understanding what they mean or where they come from. For example, prefixes like mega, giga, and tera that we use to describe computer hard drive sizes (think megabyt...

  • 數學英語 37 How to Estimate How Fast Someone is Running

    by Jason Marshall A few weeks ago I had a Twitter conversation with the former host of QDTs Modern Manners Guy, Trent Armstrong, in which Trent said something along the lines of: I've always wondered how to tell how fast a football player is going ba...

  • 數學英語 36 How to Convert Units

    by Jason Marshall In the last article, we began discussing how to convert from one system of units to anotherfor example from miles to kilometersand how all of this relates to the multiplicative identity. But we didnt quite have enough time to get to...

  • 數學英語 35 How to Convert Units

    by Jason Marshall In the last two articles weve talked about the meaning of multiplication and how to use this meaning to make multiplying fractions easier. Today, were going to put everything weve learned about multiplication to good use by learning...

  • 數學英語 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,...

  • 數學英語 33 Is Multiplication Repeated Addition?

    by Jason Marshall In past articles weve talked at length about three of the big four traditional processes used in basic arithmetic: addition (see also How to Add Quickly), subtraction, and division. However, for one reason or another, we havent yet...

  • 數學英語 32 How to Use Math to Make Estimates

    by Jason Marshall In the first secret-agent math article, How to Use Math to Send Encrypted Messages, we learned how to decrypt messages secured with absolutely unbreakable encryption using nothing more than simple integer arithmetic. It was all grea...

  • 數學英語 31 What are Area and Volume?

    by Jason Marshall The last article about how to use math to send encrypted messages ended with a bit of a cliffhanger. The good news is that you will soon find out how the story ends. But, as I warned last time, the bad news is that that isnt going t...

  • 數學英語 30 How to Use Math to Send Encrypted Messages

    by Jason Marshall Would you believe its possible to send someone a secret message secured with absolutely unbreakable encryption using only a bit of simple arithmetic? Well, it isthe solution is surprisingly simple and was used by British, German, an...

  • 數學英語 29 What are 1D, 2D, and 3D Coordinates?

    by Jason Marshall Theres been a lot of talk about 2D versus 3D in the television and movie industries lately. But what exactly does one, two, and three-dimensionality really meanboth in the everyday world and in math? Well, prepare to have your curio...

  • 數學英語 28 How to Use Statistics to Understand Poll Resu

    by Jason Marshall In todays article, were wrapping-up our introductory series on fundamental statistics by talking about how knowledge of statistical quantities like the mean and standard deviation can help you understand the significance of the late...

  • 數學英語 27 What is the Mode?

    by Jason Marshall In recent articles, weve talked about two methods of calculating average values, the mean and the median, and weve talked about some everyday uses for them such as how to use median averaging to get better photos. But thats not all...

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