1. Reading and Writing Large Numbers & Rounding Large Numbers
Chapter 2
Lesson 1 and 2

2. Reading and Writing Large Numbers

3. Place Value Every digit of a number has a place value
The place value tells you how much a digit represents
13,587
5=500
3=3000

5. 3 Ways to Write Numbers Word Form –Uses Words Number-word form
Thirty six thousand, five hundred thirteen
Number-word form
122 thousand
Standard Form
Numbers only
36,513
You will be asked to use all 3 ways!

6. Try it Write the number in word form Write in Number-Word form
13,587,003
Thirteen million, five hundred eighty seven thousand, three
Write in Number-Word form
93,000,000,000
93 billion
Write in standard form
five million, one hundred eight thousand, nine
5,108,009

7. Rounding Large Numbers

8. Why Rounding? Working with large numbers can be inconvenient
Can give you a close answer when the exact number is not needed

9. How do you round? You will be asked to round to a certain place value
Round 113,868 to the hundreds place
Box number in place value
113,868
Look at number to the right of the box

10. 113,868
If the number to the right of the box is 5 or higher, change the name
Less than 5 stays the same
All numbers to the right of the box turn to zeros
113,900

11. What about this? Round to the given place 1,698,017 – ten thousand
1,700,000
How did you get this number?