Step-by-step instructions (PowerPoint) on how to use factor trees to decompose a number into a product of primes.
This can be left on a loop while the class are working.
A further menu driven PowerPoint that has ALL the solutions for each number (minus a few variations)
No worksheets. I just get the pupils to ‘shout out’ several numbers between 2 and 100 and write these on the board.
(although I sometimes add a few myself)
Class marks their own work from solutions PowerPoint
Creative Commons "Sharealike"
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