Find here, thanks to two students of ESO (Jimena and Mónica) some clear and useful notes about the unit.
There are also some videos about the main lessons.
👉 Click on the picture to download the notes for:
Prime numbers and divisibility Rules:
Prime factorization Process:
This video may help you to understand the factorization proccess.
Common Multiples and common factors:
Watch these two videos about Common Factors and the Highest Common Factor:
And Common multiples and the Lowest Common Multiple
General method to find the LCM and the HCF:
Watch this video to learn the general method to calculate LCM and HCF
Two examples, calculate the HCF and LCM of 45, 21 and 84
Question What is the HCF and the LCM when there is not any common factor?
Watch the solution here:
