Unit 2 Lesson 8 Part 1: Rounding to the Nearest Thousand Copyright © 2009 Kelly Mott.
Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.
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Transcript of Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.
![Page 1: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/1.jpg)
Lesson 2: Place Value and Rounding
GROUP LESSON
All Periods: 9/16/15
![Page 2: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/2.jpg)
Assign Roles:Team Captain (two): Will make sure everyone is on task and understands each section before moving forward. Also, make sure everyone is taking smart notes.
“Leave No Man
(or Woman) Behind”
![Page 3: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/3.jpg)
Assign Roles:Materials Manager: Gathers all necessary materials for completion of lesson and keeps them organized when returning (white boards, practice sheets, etc).
![Page 4: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/4.jpg)
Assign Roles:CFU Leader: Will make sure everyone completes “Whiteboard CFU” without looking at their notes. Make sure everyone in group shares their answers and works together in figuring out what mistakes were made.
![Page 5: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/5.jpg)
Lesson ObjectivesGroup will be able to…
1)Effectively and efficiently take concise notes on the topic of place value and rounding.
2)Properly be able to identify the value of specific digits in a number.
3)Accurately round to a given place value.
![Page 6: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/6.jpg)
Place ValueCopy this chart in your notebook and MEMORIZE
each place value!
![Page 7: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/7.jpg)
Rounding DecimalsBIG NOTE: “Five or more, raise the score. Four or
less, let it rest”
Example:
Round 3.1416 to the nearest hundredths:
Step 1: Find the hundredths place.
Step 2: You must look at the number AFTER the hundredths place.
Step 3: If the number is five or more, you must round up. If the number is four or less. You leave it the same.
![Page 8: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/8.jpg)
So 3.1416 is rounded to 3.14
![Page 9: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/9.jpg)
Rounding Decimals when Dividing
In order to round the appropriate place value, you must divide until after the given place value in order to know whether you round up or down.
![Page 10: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/10.jpg)
Example:Divide 109 by 7. Round to the
nearest tenths place.
(which means you need to divide two places after the decimal)
Let’s practice…
![Page 11: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/11.jpg)
Answer:=15.6
![Page 12: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/12.jpg)
Whiteboard CFUQuiz Your Group
Divide 249 by 13. Round to the nearest hundredths.
![Page 13: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/13.jpg)
Whiteboard CFUQuiz Your Group
Dan received a 13 out of 17 on his science quiz. What percentage did Dan receive on his quiz. Round to the nearest tenth.
![Page 14: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/14.jpg)
Whiteboard CFUQuiz Your Group
Round 1.2635 to the nearest tenth
![Page 15: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/15.jpg)
Whiteboard CFUQuiz Your Group
Round 12.45678 to the nearest hundredths.
![Page 16: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/16.jpg)
Whiteboard CFUQuiz Your Group
Round 34.576456 to nearest thousandths.
![Page 17: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/17.jpg)
Rounding with Whole Numbers
When asked to round a number to the nearest tens, hundreds, etc, you would replace the removed digits with zero.
![Page 18: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/18.jpg)
Example:Round 134.9 to the nearest tens place.
=130
... the next digit (4) is less than 5 so we remove the 4 and replace it with a zero
![Page 19: Lesson 2: Place Value and Rounding GROUP LESSON All Periods: 9/16/15.](https://reader031.fdocuments.us/reader031/viewer/2022020111/56649ecf5503460f94bdc8a5/html5/thumbnails/19.jpg)
Whiteboard CFUQuiz Your Group
Round 12,690 to the nearest thousands place.