Q&A #18923

Teachers' Lounge Discussion: Subtracting fractions

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From: Loyd

To: Teacher2Teacher Public Discussion
Date: 2010122117:21:38
Subject: Re: Subtraction fractions with Calculator

Many teachers don't allow the use of a calculator but the type of
problem posted by myself on this date can be easily solved by using
the calculator that is often allowed for problems of this type.  That
is the CASIO fx260 which is allowed on tests such as GED and in some
testing.  The value of the calculator such as the low cost CASIO or
equivalent is that a student can check their work and gain confidence
in their procedure. 

I wouldn't let a student use the calculator in all testing but after
he/she understands the procedure, I believe it is worth while. 

For example, the problem 10 3/7 subtract 5 2/3 can be solved on the
fx260 by pushing the following buttons:

10 fraction button 3 fraction button 7 - 5 fraction button 2 fraction
button 3 then push "=".  The answer is as indicated previously.  

The fraction button looks like a mixed number and is a b/c.


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