Teacher2Teacher 
Q&A #1521 
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From: Harriet <hsacks@goucher.edu> To: Teacher2Teacher Public Discussion Date: 1999112820:15:43 Subject: Re: Subtraction There is a helpful article, "Make 10 and Add" by Lola May, in the October '99 issue of Teaching PreK8. 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 148: 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 / 108=2, Write a 2 outside of the hill above the eight From 10 to 14 is how much? / 10+4=14 / 1410=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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