Factors & Primes

Prime Factor Tree Discovering Prime Factors of Any Number

Definitions
Prime Number – An integer whose only factors are 1 and itself.
Factor – a number that can divide another number without a remainder.
Prime Factors – an expression of numbers that divides another integer without a remainder where all the factors are prime.

Let’s Choose a Number
Let’s use 36
Choose any 2 factors – let’s use 9 and 4
Now let’s factor these numbers, too
Next, arrange them from least to greatest
Last, re-write as exponents
36 4 9 x 2 2 x x 3 3 2 2 x 3 2 2 2 3 3 x x

Let’s Try That Again!
Let’s use 36 again
Choose any 2 factors – let’s use 3 and 12
Now let’s factor these numbers, too
Oops, 6 is not prime - let’s factor again!
Next, arrange them from least to greatest
Last, re-write as exponents
Look, it’s the same answer!
36 3 x x 2 6 12 3 x 3 x x 3 2 2 x 2 x 3 x x 2 3 2 2 x 3 2

Let’s Re-Cap
Composite numbers are made up of factors
In a Prime Factor Tree, the goal is to keep reducing each factor to its lowest possible prime factors
When you have all the prime factors identified, re-arrange them from least to greatest and re-write them as exponents

This powerpoint was kindly donated to www. worldofteaching .com http://www. worldofteaching .com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

Factors & Primes

by Middle School on Feb 03, 2010

Accessibility

Categories

Tags

Upload Details

Usage Rights

2 Embeds 6

Statistics

Factors & Primes — Presentation Transcript

http://msdhpowerpoints.blogspot.com	5
http://cursos.itesm.mx	1