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數學學習の好朋友

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數學學習の好朋友

計算機 Calculator

施信華 兼任助理教授

國立彰化師範大學 師資培育中心

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計算機的種類

一般型 臺灣 國家考試型 美 國 課 堂 及 S A T 考 試 及 繪 圖 型 工程型 國 外 繪 圖 及 物 聯 網 型 新 課 綱 教育部規劃自訂規格用於教學及考試

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核心素養

一個人為適應現在生活及面對未

來挑戰,所應具備的知識、能力

與態度。

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數學學習應更重視…

經驗建構與學習鷹架

習是一種認知發展的過程,數學學習

更應著重視經驗的建構與生活情境的鏈

結。

鏈結學生學習經驗與學習鷹架,並要

能活用在生活境況的問題解決。

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數學 Mathematics

是一種應用的工具

是一種認知的建構

是專業學科學習的基礎與工具

是培養理性推論、批判思考

是體現全人教育理想的重要介面

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A

construction engineer correctly computes the maximum safe load of a bridge to be 1000(99-70 2 ) tons.

H

e approximates 2 as 1.4. The bridge is built, and on the day it is opened to traffic, it collapses under a load less than a tenth of the weight the engineer thought it could beer.

C

an you explain the engineer's mistake?

位建築工程師,他精確的計算出一座橋的最大負荷重量為

1000(99-70 𝟐 )噸,他在計算時把 𝟐當成1.4,然後完成了這

座橋的設計,當開放通行的那一天,這座橋卻在承受其最大負

荷重量的十分之一時便崩塌了!

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請拿出計算機

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建議:背蓋可以不用放置計算

機背面,方便參考模式區。

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A區 功能區 B區 運算區 C區 模式區

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A區:

功能區

黃色功能 開關、一切歸零

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B區:

運算區

螢幕歸零

圓周率、科學記號

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1.一切歸零 2.記憶全消除 3.回到DEG模式(度度量) 4.回到一般計算模式 5.開始新的運算就按一下 1.螢幕歸零 2.記憶體內容保留 1.輸入歸零 2.前面運算保留

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實戰例題說明

數學學習

の好朋友

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25000 ÷ 100 = 250

tan 𝜃 =

3952 − 2610

23.5 × 250

= 𝐴𝑁𝑆

θ = tan

−1

𝐴𝑁𝑆

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sin28° =

𝐴𝐵

𝐵𝐶

, 𝐵𝐶 =

2.85

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3000000

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a = 1 × −3.14 + 3 × 17 1 + 3 ≈ −0.678 b = 1 × 0.23 + 3 × −313 1 + 3 ≈ −0.116

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計算機

小技巧

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計算機

小技巧

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計算機

好玩嗎?

算數學時, 驗算看看!

無聊時, 玩看看喔!

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