add together add up cast (dated) count up foot up reckon up sum sum up <span class="searchmatch">summate</span> [⇒ thesaurus] tally tally up tot tot up total [⇒ thesaurus] tote...
Thesaurus subtract subtract take [⇒ thesaurus] take away <span class="searchmatch">summate</span> [⇒ thesaurus] calculate [⇒ thesaurus] arithmetic “85. numeration” in Roget's...
reckon supputate (obsolete) suppute (obsolete) work out (transitive only) <span class="searchmatch">summate</span> [⇒ thesaurus] subtract [⇒ thesaurus] multiply divide [⇒ thesaurus]...