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Topic: Other Issues for Grades 4 and 5
Replies: 131   Last Post: Oct 25, 2006 7:55 PM

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 Mike Swaine Posts: 28 Registered: 12/3/04
"Ask the Author" example
Posted: Jul 11, 2000 12:35 PM
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re: Susan Jo Russell - Algorithms

At Megan Murrays request I have visited your ÃÂAsk the AuthorÃÂ section
of the CESAME site inquiring how TERC regards traditional algorithms.

I am trying to understand the point you are making in the second
example you offer. By my calculation the traditional algorithm 62x36
requires three steps (step1- 6x62, step2- 3x63, then add the sums
step3- 372+1860=2232)

In your distributed example 62 x 36 = (62 x 30) + (6 x 60) + (6 x 2).
I see four steps (step1- 62 x 30, step2- 6 x 60, step3- 6x2, step4-
1860+360+12=2232)

I like the distributive property method because of its connection to
algebra but to say that it has fewer steps I believe is not accurate.
Granted it has been some years since I set foot in a math class so my
interpretation may be in error. Could you please point the error of my
thinking here.

Thank you,
Mike Swaine

Date Subject Author
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