This is a step by step guide, first through multiples and factors before going onto comparing two or more numbers. I use 'factor bugs' as I found that this suits students who particularly forget what a 'factor' is, as it is a way of working out factors of a number visually. You will have to draw the factor bugs legs. There are notes in the footnote of the slide. There are activities for the students to complete.
Thank you to other TES members who also share.