NS 1.4 Prime Factors

Number Sense

NS 1.4 Determine the prime factors of all numbers through 50 and write numbers as the product of their prime factors using exponents to show multiples of a factor (e.g., 24 = 2 x 2 x 2 x 3).

Prime Numbers 1 to 100

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97

1 = Not prime nor composite, it is the identity or neutral number.

2 = Prime

3 = Prime

4 = 2 x 2

5 = Prime

6 = 2 x 3

7 = Prime

8 = 2 x 2 x 2

9 = 3 x 3

10 = 2 x 5

11 = Prime

12 = 2 x 2 x 3

13 = Prime

14 = 2 x 7

15 = 3 x 5

Additional Information

• http://www.mathsisfun.com/prime-factorization.html
• http://www.mathsisfun.com/prime-composite-number.html
• http://www.mathplayground.com/factortrees.html
• http://www.dummies.com/how-to/content/how-to-use-prime-factorization-on-composite-numbers.html