100
                            18  +  (-9)
                            What is positive?
                         
                    
                 
            
                
                    
                        
                            100
                            -3  +  (-12)
                            What is -15?
                         
                    
                 
            
                
                    
                        
                            100
                            -54  +  (-48)
                            What is -102?
                         
                    
                 
            
                
            
                
            
         
    
        
            
                
                    
                        
                            200
                            -300  +  (-100)
                            What is negative?
                         
                    
                 
            
                
            
                
                    
                        
                            200
                            120  +  (-78)
                            What is 42?
                         
                    
                 
            
                
                    
                        
                            200
                            -10  -  (-10)
                            What is 0?
                         
                    
                 
            
                
                    
                        
                            200
                            -21  -  19
                            What is -40?
                         
                    
                 
            
         
    
        
            
                
                    
                        
                            300
                            25  +  (-75)
                            What is negative?
                         
                    
                 
            
                
            
                
                    
                        
                            300
                            -500  +  150
                            What is -350?
                         
                    
                 
            
                
            
                
                    
                        
                            300
                            19  -  (-16)
                            What is 35?
                         
                    
                 
            
         
    
        
            
                
                    
                        
                            400
                            15  -  (-20)
                            What is positive?
                         
                    
                 
            
                
                    
                        
                            400
                            -34  +  (-34)
                            What is -68?
                         
                    
                 
            
                
                    
                        
                            400
                            -425  +  (-240)
                            What is -665?
                         
                    
                 
            
                
                    
                        
                            400
                            -35  -  10
                            What is -45?
                         
                    
                 
            
                
                    
                        
                            400
                            -50  -  (-49)
                            What is -1?