Draw Symmetry graphic

Scratch is funny. I make two trial lessons for P3 students,  and all of them like the program language even they have no idea of programming. So I am hoping add this programming language to the IT curriculum next year. As a math teacher, I wrote a project to help my student understand how to drawing symmetrical graphic by counting grids.

Here is the project. To view the project, please make your browser to enable run the script below, just click the little shied on up right corner of your browser. Or view the little project on Scratch page.

卷9-10題

組合問題，首先要考慮不同順序的取法是否算作不同，要根據實際情況考慮。

卷10-13題

分數題目乃我最愛啊，不過這題用方程很好解決，所以省略了可以用比例的方法。

解答如下

解答過程寫得應該還容易理解。

因為用的是方程，所以沒什麼很好的美感，也不會有什麼驚嘆號❕。如果用足球⚽️來比喻，暴力的方程解法就是德國隊的踢球法，那用比例的方法就好像是Messi的踢球技術，那才是好看。