Message #1016 in Discussion #243: Keynote Part 1

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posted by:	Anne Collins on May 13, 2003 at 11:49AM
subject:	Analyzing A student produced method.

The student appears to be subtracting the digits and is using a
negative sign to indicate that 2-7 = -5, 3 - 5 = -2, and 1 - 0 = 1.
Since the child appears to have listed the numbers in the correct place
value it appears as though the sub-difference is 100 - 20 - 5 which is
75.

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

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