logging in or signing up Rounding Decimals afabbro Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 2404 Category: Education License: All Rights Reserved Like it (2) Dislike it (0) Added: May 23, 2008 This Presentation is Public Favorites: 4 Presentation Description Rounding decimals Comments Posting comment... Premium member Presentation Transcript Rounding Decimal Numbers : Rounding Decimal Numbers Sometimes close enough is good enough! Slide 2: Molly has $16 in her pocket She buys: 3 hotdogs @ $1.89 each 3 milkshakes @ $2.19 each 3 Large French fries @ $ $1.79 each Does she have enough money? Why do we need to know how to round decimals? Slide 3: Gas costs $1.79 per gallon I’m running on empty and I have a 20 gallon tank on my truck…… About how much will it cost to fill up? You have one hour to take a 50 question test. : You have one hour to take a 50 question test. About how much time can you spend on each question? Close enough is good enough! The Rounding Poem : The Rounding Poem Find your number Look right next door 4 or less, just ignore 5 or more add one more! Rounding Whole Numbers : Rounding Whole Numbers Round 474 to the closest hundred. 474 Find your number Look right next door Four or less, just ignore Five or more, add one more Slide 7: 474 Rounded to the hundreds becomes 500 Round 474 to the closest 10’s 474 Just ignore - 470 Try These : Try These 4,215 394 279 127,591 638 Are You Right? : Are You Right? 4,215 4,200 394 400 279 300 127,591 127,600 638 600 What about decimal numbers : What about decimal numbers The same rules (and poem) apply! Round 4.167 to the closest hundredths 4.167 Find your number Look right next door 4.17 Remember : Remember If you are asked to round to the nearest tenth…….your answer stops at the tenth place! Example: Round 42.73 to the closest tenth would be 42.7 Special Case!Rounding a 9 : Special Case!Rounding a 9 Round 2.197 to the closes hundredths Since there is a “9” in the hundredths place consider the tenth and hundredths together – 19 – do you leave it at 19 or move it to 20? Slide 13: Round 4.95 to the closest tenth Since there is a “9” in the tenth spot consider the ones and tenths together…… should you leave it at 49 or move it to 50? 4.95 rounded to the nearest tenth is 5.0 Try these : Try these Round to tenths: 4.56 4.6 5.32 5.3 0.98 1.0 Round to hundredths 18.784 18.78 9.456 9.46 9.997 10.00 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Rounding Decimals afabbro Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 2404 Category: Education License: All Rights Reserved Like it (2) Dislike it (0) Added: May 23, 2008 This Presentation is Public Favorites: 4 Presentation Description Rounding decimals Comments Posting comment... Premium member Presentation Transcript Rounding Decimal Numbers : Rounding Decimal Numbers Sometimes close enough is good enough! Slide 2: Molly has $16 in her pocket She buys: 3 hotdogs @ $1.89 each 3 milkshakes @ $2.19 each 3 Large French fries @ $ $1.79 each Does she have enough money? Why do we need to know how to round decimals? Slide 3: Gas costs $1.79 per gallon I’m running on empty and I have a 20 gallon tank on my truck…… About how much will it cost to fill up? You have one hour to take a 50 question test. : You have one hour to take a 50 question test. About how much time can you spend on each question? Close enough is good enough! The Rounding Poem : The Rounding Poem Find your number Look right next door 4 or less, just ignore 5 or more add one more! Rounding Whole Numbers : Rounding Whole Numbers Round 474 to the closest hundred. 474 Find your number Look right next door Four or less, just ignore Five or more, add one more Slide 7: 474 Rounded to the hundreds becomes 500 Round 474 to the closest 10’s 474 Just ignore - 470 Try These : Try These 4,215 394 279 127,591 638 Are You Right? : Are You Right? 4,215 4,200 394 400 279 300 127,591 127,600 638 600 What about decimal numbers : What about decimal numbers The same rules (and poem) apply! Round 4.167 to the closest hundredths 4.167 Find your number Look right next door 4.17 Remember : Remember If you are asked to round to the nearest tenth…….your answer stops at the tenth place! Example: Round 42.73 to the closest tenth would be 42.7 Special Case!Rounding a 9 : Special Case!Rounding a 9 Round 2.197 to the closes hundredths Since there is a “9” in the hundredths place consider the tenth and hundredths together – 19 – do you leave it at 19 or move it to 20? Slide 13: Round 4.95 to the closest tenth Since there is a “9” in the tenth spot consider the ones and tenths together…… should you leave it at 49 or move it to 50? 4.95 rounded to the nearest tenth is 5.0 Try these : Try these Round to tenths: 4.56 4.6 5.32 5.3 0.98 1.0 Round to hundredths 18.784 18.78 9.456 9.46 9.997 10.00