Message #1122 in Discussion #243: Keynote Part 1

posted by:	Andreas Stylianides on May 14, 2003 at 3:22PM
subject:	What this student would do next...

I think there are at least two possibilities other than writing 1-1-9.
One would be to write 100 – 20 + 1. The other would be to keep the
positive digits (taking account of the place value) and subtract the
negative (again, taking account of the place value), that is, 101 – 20.

Thread View

Discussion: The Example of Analyzing Mathematical... - posted by Deborah Ball on 05/12/03 - 12:05
- Analyzing A student produced method. - posted by Anne Collins on 05/13/03 - 11:49
  - What if the - isn't a minus sign ? - posted by Judith Fonzi on 05/13/03 - 04:31
    - What next? - posted by Mike Gilbert on 05/16/03 - 12:18
- How about this - posted by Ed Wall on 05/13/03 - 02:47
  - What this student would do next... - posted by Andreas Stylianides on 05/14/03 - 03:22
  - how about this - posted by Jane-jane Lo on 05/21/03 - 04:31

Home • Keynote • Poster Hall • Panels • Discussants Reflect • Resources • Lounge • Info Center

Discussion: Keynote Part 1