This Pre-Algebra video tutorial explains the process of adding and subtracting integers on a number line.  it includes plenty of examples with adding negative numbers and subtracting negative numbers.  The use of a number line simplifies the process of adding integers and subtracting integers.  This video contains practice problems of adding and subtracting integers with different signs as well.

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Algebra Review:        
Algebra 2 Introduction, Basic Review, Fact...

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Basic Addition:                                                      
Addition | Math

Basic Subtraction:                                                
Subtraction | Math

Addition and Subtraction - Number Lines:        
Mathematics Basic Introduction - Addition ...

Long Multiplication:                                              
Math - Long Multiplication

Lattice Multiplication:                                          
Lattice Multiplication

Area Model Multiplication:                                  
Math - Area Model Multiplication

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Basic Division:                                                        
Basic Division Explained!

Long Division:                                                        
Long Division Made Easy - Examples With La...

Short Division:                                                        
Short Division - A Fast Method!      
                                   
Mental Math Tricks:                                              
Mental Math Tricks - Addition, Subtraction...

Exponentiation and Tetration:                          
Math - Addition, Multiplication, Exponents...

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