Introduction into HCF, LCM using prime factor decomposition
Used with a middle set year 9 class, starting the new GCSE curriculum.
Starts with how to use prime factor trees to write a number as a product of its prime factors, then onto how to use that to find the HCF and LCM of two numbers.
Includes starter, learning objectives page, differentiated questions with answers and learning objective tick sheets!
Ready to use straight away or can be edited.


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  • 4.9prime-hcf-lcm(new).pptx

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Created: Aug 25, 2016

Updated: Apr 16, 2018

Whole lesson

pptx, 175 KB


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Creative Commons "Sharealike"