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比率、比例和百分比Ratio, Proportion and Percentages |
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| 课程网址: | http://openlearn.open.ac.uk/course/view.php?id=3419 |
| 主讲教师: | The Open University |
| 开课单位: | 英国开放大学 |
| 开课时间: | 信息不详。欢迎您在右侧留言补充。 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | The topics in this free course, Ratio, proportion and percentages, are concerned with dividing something into parts. For example, if there are 200 people living in a small village, and 50 of these are children, this could be expressed as a percentage: 25% of the village population are children; or as a ratio: one in every four people is a child or there is 1 child for every three adults; or a proportion: the proportion of children in the village population is a quarter. |
| 关 键 词: | 百分数; 比例; 数学 |
| 课程来源: | 开放大学公开课 |
| 最后编审: | 2016-05-12：cmh |
| 阅读次数: | 49 |