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August 30, 2014

Posted by **Nancy** on Wednesday, November 30, 2011 at 4:29pm.

- 4th grade -
**Ms. Sue**, Wednesday, November 30, 2011 at 4:35pm640 - 190 = ?

http://www.aaamath.com/est73ax3.htm

http://www.basic-mathematics.com/front-end-estimation.html

- 4th grade -
**Anonymous**, Wednesday, September 12, 2012 at 9:32pmdont know

- math -
**ernesto**, Tuesday, September 18, 2012 at 9:36pmhow you would use front-end estimation to subtract 189 from 643 explain

- 4th grade -
**Anonymous**, Tuesday, November 6, 2012 at 2:15pmi think it would be 990 or 1,000

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