Results 1 to 5 of 5

Math Help - terminating fractions

  1. #1
    Member
    Joined
    Oct 2007
    From
    Nevada
    Posts
    188

    terminating fractions

    (A) List all of the denominators between 2 and 25 that terminate.
    answer: 2,4,5,8,10,16,20,25.

    (B) Explore the prime factors of these denominators. What do they all have in common?
    answer: please help me here. thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,715
    Thanks
    633
    Hello, DINOCALC09!

    (A) List all of the denominators between 2 and 25 that terminate.

    Answer: 2, 4, 5, 8, 10, 16, 20, 25 . . . . Right!


    (B) Explore the prime factors of these denominators.
    What do they all have in common?

    Did you even look at the prime factors?

    \begin{array}{ccc}2 &=& 2 \\ 4 &=&2^2 \\ 5 & = & 5 \\ 8 &=&2^3 \\ 10 & =& 2\cdot5 \\ 16 &=&2^4 \\ 20 &=&2^2\cdot5 \\ 25 &=&5^2 \end{array}

    Notice anything?

    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Oct 2007
    From
    Nevada
    Posts
    188
    yes, i see that. but i don't know how to word what i see.

    am i supposed to talk about a pattern, or am i clearly missing something
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,715
    Thanks
    633
    Those denominators have prime factors of 2 or 5 only.

    They are of the form: . 2^m\cdot5^n .for nonnegative integers m\text{ and }n.

    Follow Math Help Forum on Facebook and Google+

  5. #5
    namrata
    Guest

    want to know in details about friction

    I am having the following doubts

    1. Which number is a factor of every number ?
    2. Is 8/1 a unit fraction?
    3. Convert 15/7 into an improper fraction.
    4. Write 4/9 in workds
    5. Convert 7/2 into a mixed number
    6. What is proper friction and improper friction
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: April 28th 2010, 09:53 AM
  2. Terminating Decimal Proof
    Posted in the Number Theory Forum
    Replies: 5
    Last Post: January 18th 2010, 05:52 PM
  3. Simplifying Fractions over fractions
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 28th 2009, 10:20 AM
  4. simplifing fractions over fractions
    Posted in the Algebra Forum
    Replies: 1
    Last Post: December 16th 2007, 01:57 PM
  5. Terminating fractions
    Posted in the Algebra Forum
    Replies: 2
    Last Post: March 25th 2007, 06:07 PM

Search Tags


/mathhelpforum @mathhelpforum