
Add up to
Context Clues
 Pay attention to context; 'add up to' involves accumulation of things, usually numerical. 
Her weekly earnings add up to her monthly budget.
 Small Contributions
 Understand that 'add up to' can describe how small amounts or acts contribute to a larger whole. 
A number of small donations added up to a substantial charity fund.
 Result Emphasis
 It emphasizes the result of adding multiple things together. 
Their joint efforts added up to the project's success.