Number Sense By: Student 1

Introduction In this unit we will learn: – Adding & Subtracting Review – How to Compare Numbers – Ordering numbers from – Writing numbers in: Expanded Form Written Form Standard Form ***Our project will consist of us students adding and subtracting money***

Adding & Subtracting Adding and Subtracting Examples: = = 7

Comparing Numbers The number line is used to show the value of different numbers **Highlighted numbers are those that were placed on the number line. Which comes next in the sequence: 2,4,_,8,105,_,_20,25 1,3,7,_,1010,_,30,40,50

Place Value All numbers have a value. Some numbers contain more value than others. – For example: Ones place: 1 Tens place: 10 Hundreds place: 100 Thousands place: 1,000

Greater than and Less than Numbers have different values Some have greater values than others and some are less in value than others – For example: Greater than symbol: > Less than symbol: < Equal to: =

Greater & Less than examples Examples: 5>27<1915=15 17<25100<101 26=2654>24 Is it true? 19<2048=84 13>3375>33

Writing numbers in different forms We write numbers in different ways. –Expanded form: = =58 1, = 1,375 Your turn: Write numbers in expanded form: , ,421

Number’s in different forms Written Form – 96 Ninety Six – 13 Thirteen – 489 Four hundred and eighty nine – 3,542 Three thousand five hundred and forty two Your turn: Write problems in written form: 461, ,

Number’s in different form cont’ Standard Form – We write numbers in standard form all the time and do not even realize it. For example: 56- this is standard form 623- standard form 4,589- standard form too Pretty easy friends!!

Works Cited “Alabama Learning Exchange” by Alabama Department of Education,