add together add together /æd təˈɡɛðər/

verb

1. (arithmetic) make an addition by combining numbers  ( add together , add )
   (arithmetic) make an addition by combining numbers
    Add 27 and 49, please!
   Add 27 and 49, please!
   
2. Determine the sum of  ( add together , sum , sum up , add , summate , tally , tot , tot up , tote up , add up , total )
   determine the sum of
    Add all the people in this town to those of the neighboring town
   Add all the people in this town to those of the neighboring town