Signed Number Nomograph



    A nomograph is set of 3 parallel number lines and a 4th line used to set up and complete an addition or subtraction.

    This one is set up to show that the sum of -4 and +2 is -2.

-4 the addend, is on the bottom line,
2 the addend, is on the top line,
- 2, the sum, is on the middle line.


Components of a Nomograph

    Each nomograph requires:



To Use a Nomograph to Add

  1. Stretch the rigid line from an added on the top line to the other addend on the bottom line.
  2. Read the sum at the intersection of the rigid line and the middle number line.


To Use a Nomograph to Subtract

  1. Stretch the rigid line from the subtrahend on the top line through the minuend on the middle line then continue the line to the bottom line.
  2. Read the remainder at the intersection of the rigid line and the bottom number line.


It Takes All Kinds

    Use different scales to make different nomographs.



A Nomograph Bulliten Board

    Fill the bulliten board with directions, the 3 parallel number lines at a height convenient for students use.    A string or stick must be available to strentch from -5 on the top to -5 on the bottom with the string attached at the positive end of the number lines.


© 2005, A2, www.mathnstuff.com/math/spoken/here/2class/130/nomogrf/nomo.htm
[MC,i. Home, site home page] [master list of all MSH! dictionary words] [tutorials & resource material arranged by topic [Good Stuff -- free & valuable resources] [this semester's schedule w/links]