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Q&A #1521

Teachers' Lounge Discussion: Subtraction

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From: Harriet <hsacks@goucher.edu>
To: Teacher2Teacher Public Discussion
Date: 1999112819:15:43
Subject: Re: Subtraction

There is a helpful article, "Make 10 and Add" by Lola May, in the
October '99 issue of Teaching PreK-8.  The article describes the "Hill
Method" for subtraction. Below is a brief description of how the hill
method works, the article suggests approaches to introducing this
method in your classroom and further discusses this method and how
it's applicable to more advanced subtraction


Hill Method for 14-8: 

-Draw a hill and write 8 and 14 under under the hills end
-Write 10 in the hill
-From 8 to 10 is how much? / 8+2= 10 / 10-8=2, Write a 2 outside of 
the hill above the eight
-From 10 to 14 is how much? / 10+4=14 / 14-10=4, Write a 4 outside of 
the hill above the 14 
-Add the 2 and the 4, answer is 6

 2  * * * *  4
   *   10   *
  *          *
 8           14

      = 6

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