Visualize the fraction multiples of a number and demonstrate a/b × c/d = (ac)/(bd).
中文版：http://www.geogebratube.org/material/show/id/15555
Anthony C.M. Or.
Education Bureau, Hong Kong.
- Target Group (Age)
- 11 – 14
- Language
- English (United Kingdom)
Error
A timeout occurred. Trying to re-save …
Sorry, but the server is not responding. Please wait a few minutes and then try to save again.
