Prime Factor Form

There are many ways to introduce and express numbers as a product of prime factors but recently I have been looking at questions that use prime factor form.

I’m not including HCF or LCM in this because most teachers have used PFF to solve HCF and LCM problems before.

Here are some questions I have written that can be solved easily using PFF

pff1pff2pff3

These are on the ppt below

Prime Factor Form

I also like this activity I made, its simple practice but saves paper if you display it as a ppt

pff4Primes and Prime Factors

Update

I made this starter to use with year 10

Prime Factor Form Questions

Screen Shot 2017-11-07 at 21.48.42Screen Shot 2017-11-07 at 21.48.53Screen Shot 2017-11-07 at 21.49.01

UPDATE! Prime Factor Form Challenge. The idea is students are faced with increasingly more challenging PFF questions. They need to think about divisibility to help them and they know the numbers are listed below. It can generate some interesting discussions about numbers/divisibility. Students who are faced with a large number that isn’t divisible by 2, 3 or 5 may believe the remainder is a prime number. Once the number is written in PFF they can asign the correct letters and unscramble the word.

pff5pff6pff7

Here is the ppt for PFF pff

prime.png

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