Number & Operations in Base Ten

4th grade

Addition and Subtraction

How to Add Using the Column Method

How to Subtract Using the Column Method

Addition with Help from the Number Line

Subtraction with Help from the Number Line

Place Value

Why Should You Learn to Multiply by Powers of Ten?

How to Multiply by 10

How to Multiply by 100

How to Multiply by 1000

How Do You Divide by 10?

How Do You Divide by 100?

How Do You Divide by 1000?

What Is the Place-value System?

Long multiplication

How Does Long Multiplication Work?

How Long Multiplication Works

Long division

What Is Long Division?

What’s the Symbol Used for Long Division?

How Does Long Division Work with a 1-Digit Divisor?

Comparison

What Are the Greater Than and Less Than Symbols?

What Are the Greater Than or Equal to and Less than or Equal to Symbols?

How Do You Use the Number Line to Help When Comparing Numbers?

Round numbers and the place value system

How to Round a Number