在代数中，我们在称为替换的过程中用数字替换字母。给定公式 A = 1/2bh，如果底部为 5 厘米，高度为 10 厘米，则面积为 ½ X 5 X 10，因为我们已经将 b 替换为 5，将 h 替换为 10。你只需要小心负数：在计算负数时最好使用方括号。 请访问我们的网站 www.fuseschool.org，我们所有的视频都按照主题和顺序经过精心整理过。请评论、点赞和与其他学员分享。你可以提问和回答问题，老师会回复你。 这些视频可以在翻转课堂模式中使用，也可以用作修订辅助工具。 本开放教育资源是免费的，根据知识共享许可：署名-非商业性使用 CC BY-NC（查看许可证契约：http://creativecommons.org/licenses/by-nc/4.0/）。您可以下载该视频用于非营利性教育用途。如果你想修改视频，请联系我们：info@fuseschool.org 点击这里观看更多视频：https://alugha.com/FuseSchool 推特：https://twitter.com/fuseSchool 在 FuseSchool 平台和应用程序中获得更深入的学习体验：www.fuseschool.org
Click here to see more videos: https://alugha.com/FuseSchool In this video you'll learn the basics about Ionic Bonds. The Fuse School is currently running the Chemistry Journey project - a Chemistry Education project by The Fuse School sponsored by Fuse. These videos can be used in a flipped class
In this video, we are going to look at parallel lines. To find the equation of parallel lines, we still use the y=mx + c equation, and because they have the same gradient, we know straight away that the gradient ‘m’ will be the same. We then just need to find the missing y-intercept ‘c’ value. VISI
Plants have developed responses called tropisms. A tropism is a growth in response to a stimulus; so light and water in the plant’s case. There are different types of tropisms: Positive tropisms are when growth is towards the stimulus - so the plant growing towards the light to maximise the stimul
