This is a prototype of JavaSketchpad, a World-Wide-Web component of The Geometer's Sketchpad. Copyright ©1990-1997 by Key Curriculum Press, Inc. All rights reserved. Portions of this work are being funded by the National Science Foundation (awards DMI 9561674 & 9623018).
This slide rule shows 2 + (-5) = -3.
See the slide rule for adding positive whole
numbers for a clearer idea of how it works.