Two Fraction Bars

Topic:
Fractions
This applet can be used to explore addition and subtraction of fractions. The applet provides a unit fraction bar and two additional fractions that can be controlled with the input boxes. The scale factors can be used to change denominators. If common denominator is not selected, Fraction 1's numerator and denominator are each multiplied by scale factor 1. Scale factor 2 works similarly for Fraction 2. If common denominator is selected, each fraction is converted to one with a common denominator. The scale factors allow the user to try and figure out the common denominator independently.