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

Reading and Writing Large Numbers

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

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!

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

Rounding Large Numbers

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

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

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

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