summing (noun) addition: arithmetical process of augmentation
Detalii: an addition is something that, when added, serves simply to augment or extend that to which it has been added, leaving the character of the original unchanged; an addendum forms a separate distinguishable portion of the whole and it first meant 'a thing to be added'
Sinonime: accretion, accruing, adding, computing, counting, enlarging, expanding,
increasing, reckoning, summation, summing, tabulating, totaling, toting
Antonime: subtraction