I am no longer quite sure what people mean by pre-Algebra.
However, if you mean that transition period between 'arithmetic' and
'high school algebra.' The following site might be of interest:
and the first two chapters might be helpful. A number of the sites I
might recommend were contained in that post by Mark Jackson. In
general, search for NCTM and java applet and you should come up with
some reasonable stuff.
>Can anyone help me identify web sites with pre-algebra exercises of interest
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