WordWeb Online

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

Derived forms: adding together, added together, adds together

Type of: calculate, cipher, compute, count, cypher, enumerate, figure [N. Amer], number, numerate, reckon, work out