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Topic: Useful problems
Replies: 41   Last Post: Jul 1, 1996 10:08 AM

 Messages: [ Previous | Next ]
 MCotton@aol.com Posts: 90 Registered: 12/6/04
Re: Useful problems
Posted: Jun 15, 1996 11:48 AM

In a message dated 96-06-14 12:15:44 EDT, ach@tenet.edu (Arthur Howard)
writes:

> For instance, in our decimal world, who actually
>needs to divide fractions, as fractions, and get a fractional answer?
>
>

I believe that there are at least 2 or 3 very important reasons to teach
fractions.
1) As a concrete basis for the algebraic manipulation of variables.
Multiplying by the reciprocal equals 1
Multiplication by 1 leaves the original number unchanged
The need to find a common denominator when adding fractions.
How to simplify expressions by cancelling common factors in both
the numerator and the denominator.
2) The construction trade in the United States is still firmly committed
to the foot-inch measurement system. Students need to be able to read
a ruler!
3) Much of scientific information is written using variables, and left in
fractional form until the last step when numbers are substituted.

Marge Cotton
mcotton@aol.com

Date Subject Author
6/11/96 Judith E. Jacobs
6/11/96 Andre TOOM
6/12/96 Arthur Howard
6/13/96 Andre TOOM
6/13/96 Arthur Howard
6/13/96 Andre TOOM
6/14/96 Arthur Howard
6/14/96 Andre TOOM
6/15/96 Arthur Howard
6/28/96 Andre TOOM
6/29/96 Arthur Howard
6/29/96 Andre TOOM
6/29/96 Mansel A. Nelson
6/29/96 Mansel A. Nelson
6/30/96 Andre TOOM
6/30/96 Howard L. Hansen
7/1/96 Tom Johnson
6/12/96 Judith E. Jacobs
6/13/96 Andre TOOM
6/13/96 Mansel A. Nelson
6/14/96 Andre TOOM
6/14/96 Mansel A. Nelson
6/14/96 Andre TOOM
6/15/96 Francis Fennell
6/14/96 Jack Rotman
6/14/96 Michael Paul Goldenberg
6/14/96 Arthur Howard
6/14/96 Chih-Han sah
6/14/96 Arthur Howard
6/15/96 MCotton@aol.com