Online tools

All of the near-number concepts and definitions can be interactively explored, in or out of the classroom, via the Flash animations available at:

http://www.nearnumbers.net

These are old but very functional—being Flash, they won't run on iOS (iPad/iPhone) devices, but they should work on any computer, laptop, or Android phone/device via a browser.  Note that the downloadble .swf files don't run anymore.

If you want to see and play around with any of those listed below (and more), just read the instructions to see the keys to use, and go at it:

• 0 × +∞  or  0⁺ × +∞ 
• +∞ + (−∞)
• sin(+∞)
• +∞/+∞
• e^+∞ or e^+∞