さがしものは何ですか?

osusume, arimasu.

[書籍] 考える力をつける数学の本

 

おすすめ文

数学者であり、物理学者でもあるガウス。彼は実は計算が苦手だったそうです。

1~10までの合計は?と聞かれたらどうしますか。
1+2+3+4+ ・・・+10 = 55って実際に計算して答えますよね。

では、1~100までの合計は?
素直に足しあげるか、電卓かEXCELを使って計算します。

でもガウスは、素直に足さずに道具も使わず数字の法則を考えました。
計算が苦手だからこそ、計算せずにすむ方法をさがしました。
そうやって、いろいろな法則を見つけて功績を残しました。


実際の計算方法 : ( 1 + 100) × 50 = 5050 (本書に記載してあります。)


本書では、数学が苦手な人でも、世の中の計算を面白おかしく説明するというコンセプトで書かれています。

数学=計算と思っている人。その常識が覆りますよ。

こんなあなたにおすすめ

人に使われるより使う側がいい

基本情報

日本経済新聞社 − 岡部 恒治

投稿者

今井 俊樹

最終更新

2008-02-26 12:13:43
 

コメント

  • ■ generic viagra laboratory

    <a href="https://cialisle.com/">buy cialis</a>
    AMaikiteWak  2020-06-19 06:25:04
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:22:49
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:22:52
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:22:54
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:22:57
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:22:59
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:23:02
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:23:05
  • ■ cheap generic cialis online joy

    <a href="https://cialisle.com/">cialis for sale</a>
    AMaikiteWak  2020-06-23 19:23:08
  • ■ ohandira@gmail.com

    nice
    Obbi Handira  2020-07-15 01:20:31
  • ■ dfdfdf@hotmail.com

    DNA testing can improve or quickly understand your family history – through a close relative identification of the earliest ancestor. Some tests claim to reveal your “breed”, although this is a controversial and difficult subject. <a href="https://www.dnatestguides.com/">23 and me</a> Certain services can reveal your genetic susceptibility to disease and physiological traits, from the color of your eyes to your tolerance to cilantro.[url=https://www.dnatestguides.com/]https://www.dnatestguides.com/[/url] https://www.dnatestguides.com
    23 and me  2020-07-20 11:25:49
  • ■ 無題

    Plastic inflatable dolls came about in 1968, when it became legal to sell <a href="https://www.carinsurancestars.com/">car insurance</a> via mail. By the 1980s, they were in sex shops. With the continual development of Artificial intelligence , the level of companionship has entered a new realm where the entire landscape of sexual toys <a href=https://www.carinsurancestars.com/>car insurance</a>[url=https://www.sexdolls.today/]https://www.sexdolls.today/[/url] https://www.sexdolls.today
    car insurance  2020-08-12 22:02:26
  • ■ 無題

    The <a href="https://www.dysonvacuumcleaners.com/">dyson air purifier</a> fan automatically removes 99.97 percent of allergens and pollutants as small as 0.3 microns such as pollen, bacteria and pet dander from your home. The 360 degree, vacuum-sealed glass HEPA filter removes indoor air pollutants while a second layer of activated carbon captures household odors and potentially harmful toxins such as paint fumes. Purifies all year round cools you as a fan in summer.
    Dyson Vacuum Cleaners  2020-09-01 10:07:05
  • ■ 無題

    "Single sound bar provides better sound quality compared to your TV.The
    <a href=""https://www.bissellvacuumcleaners.com/"">Bissell Vacuum Cleaners</a> is an easy solution, with advanced technologies that deliver the clear audio your TV can’t.
    Dialogue mode to make every word and detail stand out
    Bluetooth connectivity to wirelessly stream music from any of your devices
    One connection to your TV. Optical audio input (digital); Coaxial audio input (digital); 3.5 mm aux input (analog)
    Universal remote controls TV, bass, Bluetooth connections and more
    Speaker:2.6 H x 21.6 W x 3.4 D (3.73 lbs), Remote control:4.1 H x 1.6 W x 0.4 D (5 oz)"
    Bissell Vacuum Cleaners  2020-09-21 17:22:51

コメント入力フォーム

左の画像内の文字列を入力してください。(スパム防止用)