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Multiples vs factors...Help

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 Rm. 802 Joined: Sep 2007 Posts: 799 Senior Member
Rm. 802

Joined: Sep 2007
Posts: 799
Senior Member
Multiples vs factors...Help
01-09-2008, 11:24 AM
 #1

Does anyone have any neat "tricks" for helping kids keep multiples and factors straight??

Thanks!

 Cherrie28 Joined: Jul 2007 Posts: 396 Full Member
Cherrie28

Joined: Jul 2007
Posts: 396
Full Member
multiples and factors
01-09-2008, 01:18 PM
 #2

A student taught me this last year. (M)ultiples have (m)any. (F)actors have (f)ew. That kept it straight.

 GraceK Joined: Jul 2007 Posts: 3,294 Senior Member
GraceK

Joined: Jul 2007
Posts: 3,294
Senior Member

01-11-2008, 12:23 AM
 #3

I remind the kids that for "multiples" you "multiply" (or count by). They remember then that Multiples are *bigger* and they know what factors are by default. Not sure this is the best system, but it seems to work for us.

 Risa Joined: Jul 2006 Posts: 4,170 Senior Member
Risa

Joined: Jul 2006
Posts: 4,170
Senior Member
Prime, Square and Composite Numbers
01-11-2008, 01:39 AM
 #4

This is a bit 'sideways' of the topic, but the discussion of factors and multiples reminded me of our work with prime numbers. My grade level colleagues liked these pages I compiled so I thought it might be helpful to others of you teaching these terms.

My students and I went through the process of figuring out which were prime numbers, discussing factors and multiples, using "The Sieve of Eratosthenes." We used a 100's grid and crossed off the multiples of the numbers as explained on this page:
Sieve of Eratosthenes- to find the prime numbers up to 100
http://mathforum.org/dr.math/faq/faq.prime.num.html

Along with discovering prime numbers, we learned of composite numbers. At the same time, we explored a bit with square numbers. Students realized that 'square numbers' form squares when made with centimeter cubes. (2x2, 3x3, 4x4, etc)

In order to help keep all the information straight, I compiled their information and made these pages (attached)
Page 1-A page with the following information:
Prime Numbers
A number with only ‘1’ and itself as a factor
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

Square Numbers
The product of a number and itself
1, 4, 9, 16, 25, 36, 49, 64, 81, 100

Composite Numbers
A number with more than 2 factors;
not a prime number
4, 6, 8, 9 10, 11, 12, 14, 15, 16, 18, etc. to 100

Page 2- 2 per page of a smaller 100 grid with the composite numbers grayed out and prime numbers left in white, with the above info in smaller size.

The larger page I enlarged for the bulletin board. The half page was distributed to each student which they each glued into their math vocabulary notebooks.
Attached Files
 prime square comp numbers.doc (74.0 KB, 190 views)

 Perdy4 Joined: May 2007 Posts: 1,719 Senior Member
Perdy4

Joined: May 2007
Posts: 1,719
Senior Member
straight to the point!
01-12-2008, 06:38 AM
 #5

Thank you, Cherrie28! Simple...and straight to the point! I have already made my 'chart' to hang up with your suggestion. Proteacher is so wonderful! Have a great weekend!

 dbullard Joined: Aug 2007 Posts: 12 New Member
dbullard

Joined: Aug 2007
Posts: 12
New Member
Multiples and factors
01-19-2008, 06:57 PM
 #6

You get multiples when you multiply. Factors are in the facts.

 txtbook<3r Guest
txtbook<3r

Guest
rm. 568
03-04-2008, 02:37 PM
 #7

i always remember multiples=multiply, you multiply the number your dealing with so its always larger. This always keeps it trait for me nd my students!

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