数学 · GCSE · Number

Calculating with surds and rationalising denominators

gcse-math-n8d免费3:51Heddy 星级 7 颗中 2 颗，未达标

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你需要知道的

  • Expand brackets with surds like ordinary algebra.
  • √a × √a = a.
  • Rationalise by multiplying top and bottom by the surd on the bottom.

这个短片讲了

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Heddy 星级2/7, 未达标
  • 可信来源 · 已通过. 创作者本人上传，链接有效，可以在这里播放。
  • 对准知识点 · 待评. 老师看过：它主要讲的就是这个知识点。
  • 符合考纲 · 待评. 内容准确，符合现行英国考纲。
  • 聚焦 · 已通过. 只讲一个概念，短到可以一口气看完。
  • 无障碍 · 待评. 字幕可靠，声音和画面清楚。
  • 适合青少年 · 待评. 适合 11 到 16 岁的学生，没有推销。
  • 有成效 · 待评. 由我们的学生评出：看了学得会、觉得有帮助、愿意看到最后。
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Long Higher-only revision video for grades 6–9; use chapter by chapter with Year 11 Higher students.

YouTube 频道：The GCSE Maths Tutor2026-10-16 核对