Answer: readds

AnswerCrossword Clue
READDSGoes over sums.
readdsto find the sum of
readdsto say further
readdsto be an addition
readdsto join so as to increase
READDSTallies again
READDSTallies anew
READDSChecks the figures again
READDSChecks, as checks
READDSChecks one's arithmetic
READDSDouble-checks one's math
READDSDouble-checks the total
READDSChecks in the accounting office
READDSVerifies the totals
READDSTots again
READDSDouble-checks the math
READDSChecks, as a total
READDSChecks a column
READDSChecks a bill