(See Sieve)
Dream dictionary: Discerning dream meanings
…Dreaming of pondering over addition, denotes that you will have a struggle to overcome difficult situations, which will soon prominently assume formidable shapes in your business transactions. To find some error in addition, shows that you will be able to overcome enemies by fortunately discerning their intention before they have executed their design. To add figures with a machine, foretells that you will have a powerful ally who will save you from much oppression. If you fail to read the figures, you will lose fortune by blind speculation….
(Bolter | Colander | Filter | Separate | Sift | Sort | Strainer) In a dream, a sieve represents knowledge, discerning, honor, rank and discriminating between truth and false. A sieve in a dream is like a detector of true banknotes from counterfeit, a person who chooses his words, a choosy person of the type of work he does, or a discriminating buyer, a pious person, or it could represent a comb. If a sieve is given as a collateral, or as a promissory note in a dream, it means that the depositor will flunk his promise, for a sieve does not retain water. (Also see Bolter | Strainer)