Re: [新聞] 小二女兒數學好難　醫師爸求救：急，在線

https://bit.ly/3LR0ne5

google一下外國怎麼教概數
概念也是跟台灣一樣啊

What is an example of an estimate?
Sue counted the number of people entering the library each day. In one week, the numbers were: 56, 72, 34, 45, 81, and 27. Estimate how many people entered thelibrary during this week.

1. Round each number to the tens place: 60, 70, 30, 50, 80, 30.

2. Add the rounded numbers: Total is 320.

3. Conclusion: Sue estimated that about 320 people entered the library that week.

簡單來說就是四捨五入，在運算之前先取概數，再做運算。

差別在於台灣課本好像沒有告訴我們學習概數的好處

Why do we estimate in math?
Estimation makes math quick and easy when accurate answers are not necessary. For example, estimation math can be used to help budget when shopping or at a restaurant. Estimation can also be used to predict how many of one type of unit is in a population, based on a small sample.
※ 引述 《paiopapa》 之銘言：
: 　
: 　
: 1.媒體來源:
: 記者陳俊宏
: 　
: 2.記者署名:
: 記者陳俊宏
: 　
: 3.完整新聞標題:
: 小二女兒數學好難　醫師爸求救：急，在線等！
: 　
: 　
: 4.完整新聞內文:
: 　
: https://cdn2.ettoday.net/images/7274/7274631.jpg

--