Easy Addition Games 
Hard Addition Games

Drag and Drop Addition  Do addition on the computer! 
Fishing
Addition catch the fish with the addition answer (sum) 

Number Pyramid  watch the problems and choose the correct answer for the blank 
Addition or subtraction  choose addition then solve the problem, choose the answer.  
Math Baseball  Do Addition only or medium or hard. 
Expanded From Practice write number in expanded notation and add  
School Express Addition  choose the number of digits and problems you answer! 
Robot Calculator  help the robot solve problems (choose hard) 