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April 17, 2014

Posted by **TREVAIN** on Wednesday, October 22, 2008 at 10:28pm.

- MATH -
**Ms. Sue**, Wednesday, October 22, 2008 at 10:34pmThe greatest common factor is 4.

Multiply 16 * 20.

Divide that answer by 4.

This site shows that method plus another similar method.

http://www.aaamath.com/fra66i-lcm.html

- MATH -
**Reiny**, Wednesday, October 22, 2008 at 10:35pm...16 20

-----

4 | 4 5

4 | 1 5

5 | 1 1

so LCM = 4x4x5 = 80

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