Prime Factorizations 3

Way 1: Factor Trees

Let's just do one!

Find the prime factorization of 84:

First, see if you can think of times tables numbers:

84 ... splits into 12 and 7 ... We're splitting the number with branches like a tree!

84 ... splits into 12 and 7 ... 12 isn't prime, so we keep going ... 7 is prime, so circle him! That branch stops.

84 ... splits into 12 and 7 ... 12 splits into 4 and 3 ... 3 is prime! Circle him and stop that branch ... 4 isn't prime, so keep going...

84 splits into 12 and 7 ... 12 splits into 4 and 3 ... splits into 2 and 2 ... Both primes! Done!

Now you just write it out:

Here it is in exponents:

1 2 3 4 5 6 7 8 9

of 9

Prime Factorizations