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This is a Clilstore unit. You can link all words to dictionaries.

Factors and multiples

Many things happen over and over again in a fixed cycle. For example, a morning news program may have a traffic report every 7 minutes. A train may arrive at a particular station every 12 minutes or a clok may soun every 15 minutes. Can you think of anything else that happens in a fixed cycled?

Thinking about common factors and common multiples can help you solve such problems.

In this unit you will learn what multiples and factors are and how to calculate the Greatest Common Factor (GCF) and the Least Common Multiple (LCM)

Another purpose is to improve your communication skills in English, listening and working written and oral communication. 

The unit is programmed to carry out the activities in 8 sessions. Each session lasts 1 hour:

After these sessions you will be assessed by an exam.

Session 1: Factors and multiples

We are going to watch a video about multiples and factors of a number

You have to pay attention and write in your workbook the new words. The teacher will ask serveral questions. Join the debate.

Now try to do this exercises


Worksheet 1.a 

Worksheet 1.b




Today in pairs you have to do the exercises about 

Factors and Multiples Quiz


Pay attention to the video, write new words and join to debate:

After watching the video about prime and composed numbers and how to do factor trees and write the prime factorizacion you can do the worksheets:

Worksheet 3.1, Worksheet 3.2 and Worksheet 3.3



Session 4


You have to do Worksheet review

After that we will correct it.


Now, you must go to the GCF & LCM unit


Clilstore Worksheet 1.aWorksheet 1.bWorksheet 2Worksheet 3.1Worksheet 3.2Worksheet 3.3Worksheet review 4BACK

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