# 1.2 Estimation

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Published on August 7, 2008

Author: mrwilliams

Source: slideshare.net

## Description

http://mrwilliams.edublogs.org

1.2 Estimation with Whole Numbers Estimate sums, differences, products, and quotients of whole numbers.

Remember! When you round, you look to the digit to the right. 5 or greater – round UP 4 or less – round DOWN

Clustering - estimating a sum when the addends are about the same.

1802 + 2182 + 1999 2000 + 2000 + 2000

Underestimate – an estimate that is less than the exact answer.

Overestimate – an estimate that is more than the exact answer.

Image Attributions Slide 1: Image: 'three_feet' www.flickr.com/photos/26084283@N00/72697229 Slide 2: Image: 'stickynote' www.flickr.com/photos/23963249@N02/2325865367 Slide 3: Image: 'Gathering roses( bright orange)' www.flickr.com/photos/28481088@N00/182314313 Slide 5: Image: 'Sun On The Petals' www.flickr.com/photos/98799884@N00/302782756 Slide 6: Image: 'Sunset on the Charles' www.flickr.com/photos/64165252@N00/141931319

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