Media > TDT > Mental computation > MC_GT_T1_E6_fig3
MC_GT_T1_E6_fig3
    
        
    
                                                                                                                                             
            	    
    
    
Number line for a 'start unknown' problem.
Material from NZ Maths website published by the New Zealand Ministry of Education. Reproduced with permission from the New Zealand Ministry of Education © Crown.
 
  
         
         
         
         
         
			 
			