add is a crossword puzzle answer that we have spotted 30 times. annex Tally Total Mix in Tot up Attach Put in Put on Sum up Combine tack on Throw in Do a sum Total up Interject Supplement Contribute Use a + sign Put together Build on (to) Positive function? do some arithmetic "It doesn't ... up" combine with others join a religious man Contribute to the mix Make sense, with "up" Press "+" on a calculator Reckon D notice should come first What to do when you see a plus sign in Math