NUMBER VALUES The value of numbers. Number forms. How to read and write them.

Numbers Have Place Value Numbers with more than one digit show sets. Each place can only hold the value of a single digit: 0 - 9 0 - 9 Sets of 100 Sets of ten Single units Hundreds Tens Ones

Place Value Names Hundreds Tens Ones (1 flat = 10 rods) (1 rod = 10 units) Ones (units)

There are Many Ways to Show Numbers. We will look at four ways : Number Model Expanded Form Standard Form Number Word

Four Ways to Show Numbers 1. Number model hundreds tens ones 2. Expanded: 100 + 40 + 3 3. Standard: 1 4 3 4. Word: One hundred forty-three

Number Model Tens Ones 4 7

Which one shows a number model? hundreds tens ones 20+3 six 97

Expanded Form Since 4 sets of 10 is 40 and 7 units is 7 Tens Ones 4 7 Since 4 sets of 10 is 40 and 7 units is 7 the expanded form is 40 + 7

What form is this? 100 + 60 + 1 Number Word Expanded Form Standard Form

Standard Form From a Model Tens Ones 4 7 4 7

Which is standard form? Fifty - Four 54 50 + 4

Number Word from a Model Tens Ones Forty - seven

Which is the number word for 73? thirty - seven seventy - three

Which is The Model’s Standard Form? Tens Ones 43 23 30 + 4

Which is the model’s expanded form? Tens Ones 30 + 7 20 + 7 32

Show a number four ways. Number model Expanded form… 30 + 2 Tens Ones 5 2 Expanded form… 30 + 2 Standard form… 32 Number word… thirty-two

Let’s Review… Expanded form… 100 + 40 + 3 Standard Form… 1 4 3 hundreds tens ones Model Form… Expanded form… 100 + 40 + 3 Standard Form… 1 4 3 Number Word… One Hundred forty-three

Numbers 4 Ways Hundreds Tens Ones 1 hundred 2 tens 4 ones 100 + 20 + 4 100 + 20 + 4 124 One hundred twenty-four