add up

present singular third person adds up · participle present adding up · participle past added up · past added up

1. transitiveTo take the sum of; to total.

   Add up the prices and find out how much it will cost.

   1 more example

   When they added up the vaccine doses from all known and anticipate sources, they didn't have enough.

   Synonyms: sum up, tally

2. intransitiveTo accumulate; to amount to.

   If you can save even a couple of dollars per day, it will add up to a lot over a year.

   2 more examples

   It all keeps adding up / I think I'm cracking up / Am I just paranoid? / Or am I just stoned?

   1994, Green Day, “Basket Case”, in Dookie

   The bus wound its way up into San Marino, passing through the various small castellos that add up to form the diminutive country, […]

   2016, Christopher Walker, The First 49

   Synonyms: accrue, mount up

3. idiomaticintransitiveTo make sense; to be reasonable or consistent.

   His story just doesn't add up. Why would he have been at the restaurant the day before the event?

   1 more example

   Phoenix: (Hmm... Something just isn't adding up here. I wonder, who they really saw?)

   2007 March 16, Capcom Production Studio 4, Phoenix Wright: Ace Attorney – Justice for All, Europe: Capcom, →OCLC, Nintendo DS, scene: Part 3: Investigation, Circus Entrance, level/area: Turnabout Big Top

   Synonyms: compute, hang together, check out, make sense, track, figure