Creating Integers
Find a positive integer so that when you multiply 0.20 by that integer, the product is an integer. What is the smallest positive integer that will "work"? What are the smallest positive integers that will work for other decimals such as 0.05, 1.25, 0.375, 0.444..., ?
Compare your answers with the fraction equivalents of 0.20, 0.05, 1.25, 0.375, 0.444.... and .
Describe how a fraction equivalent can be determined from a decimal number.

Extensions 
Will this method work for all decimal numbers?

Related External Resources 
Visual Fractions [ java applet ]
A series of java programs using number lines to help visualize fractions and the operations on them.
No Matter What Shape Your Fractions are In
A geometric approach to fractions.
Search for Wholes
A lesson plan in which students find fractional wholes and equivalent fractions.
Submit your idea for an investigation to InterMath.
