Friday, September 11th, 2009

Today's assignment :
Correct p. 14 ( n. 5 to n. 8 )
Do p. 14-15-16 ( n. 9 to n. 17 )
Do p. 16-17-18 ( n. 1 to n. 7 )

Homework :
Finish p. 14-15-16 ( n. 9 to n. 17 )
Finish p. 16-17-18 ( n. 1 to n. 7 )

For prime factor trees, you divide the original number by the smallest prime number. You keep doing this until all factors are prime numbers.

For example, the prime factor tree for 84 would look like this :

84
2 * 42
2 * 2 * 21
2 * 2 * 3 * 7

Here, 2 * 2 * 3 * 7 features all prime numbers.

You can also use some programmed prime factorization online, like here :
http://www.mathwarehouse.com/arithmetic/numbers/prime-number/prime-factorization-calculator.php