- 
                  
Maths
 - 
                  
加法和减法
 - 
                  
Age 7-8
 - 
                    
level: Grade1
 - 
                  
Chinese
 
Author's Instructions
直式加减,横式加减拉线,加法应用题
- 
                  
Maths
 - 
                  
加法和减法
 - 
                    
Age 7-8
 - 
                    
level: Grade1
 - 
                  
Chinese
 
Author's Instructions
直式加减,横式加减拉线,加法应用题
