Number is related to Figure. Figure is a synonym of Calculate. Add is a type of Calculate. 
Split is a type of Increase. Split is related to Cut. Cut is a synonym of Ignore. Ignore is the opposite of Stare. 
Number <--RelatedTo--> Figure <--Synonym--> Calculate <--IsA-- Add 
Increase <--IsA-- Split <--RelatedTo--> Cut <--Synonym--> Ignore <--Antonym--> Stare 