f******e 发帖数: 582 | 1 My son has a math question, asking the representational form of a number.
like what is representational form of 3578?
What is representational form of a number? Thanks a lot. | Y******u 发帖数: 1090 | | a*****g 发帖数: 19398 | 3 美国教育体系大致期望学生有两种方法
1,3个1000 cubes, 5个100 squares, 7 个 10 bars 8个unit
(违背大脑数感,把超级大的 number具体化)
2,代表3个1000 和 5个100 和 7 个 10 和 8个1
(把直观的东西反复练,练到学生烦为止。没办法,有根源的)
其实这个数最好就是用算盘表示。
另外还有一个新方法,我发明的
https://farm6.staticflickr.com/5670/21288201568_62f1d67886_b.jpg
【在 f******e 的大作中提到】 : My son has a math question, asking the representational form of a number. : like what is representational form of 3578? : What is representational form of a number? Thanks a lot.
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