1 / 7

Estimating Products and Quotients

Estimating Products and Quotients. September 10, 2009. Rounding. You can estimate either a product or a quotient by first rounding each number to its greatest place value. Example A Example B 8,659 x 122 588 / 29

Patman
Download Presentation

Estimating Products and Quotients

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Estimating Products and Quotients September 10, 2009

  2. Rounding You can estimate either a product or a quotient by first rounding each number to its greatest place value. Example A Example B 8,659 x 122 588 / 29 9,000 x 100= 600 / 30= 900,000 20

  3. Compatible Numbers You can estimate using compatible numbers, which are close to the actual numbers, but are easier to solve. Example A Example B • x 41 362 / 48 25 x 40= 350 / 50= 1,000 7

  4. Range You can estimate by finding a range. When you find a range, the exact answer is between the two estimates. Example: • X 687 Round both numbers to the lesser 100 Round both numbers to the greater 100 300 x 600=180,000 400 x 700= 280,000 Underestimate Overestimate So the product 342 x 687 is between 180,000 and 280,000!

  5. Practice with Rounding • X 9,031= 6,238 / 76= • / 87= 489 x 2,970=

  6. Practice with Compatible Numbers • X 9,031= 6,238 / 76= • / 87= 489 x 2,970=

  7. Practice with Range • X 9,031= 6,238 / 76= • / 87= 489 x 2,970=

More Related