Add the following

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1.  (-3) +  (-5)   =  

2.  (-100)  +  (-10)   =  

3.  20  +  (-72)   =  

4.  82  +  (-75)   =  

5.  -48  +  (-15)   =  

6. -225  +  (-63)   =