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g to, or designating, the number sixty; poceeding by sixties; sixty years old. Sexagenary arithmetic. See under Sexagesimal. -- Sexagenary, or Sexagesimal, scale (Math.), a scale of numbers in which the modulus is sixty. It is used in treating the divisions of the circle.

y there were no others used in astronomical calculations. -- Sexagesimal, or Sexagenary, arithmetic, the method of computing by the sexagenary scale, or by sixties. -- Sexagesimal scale (Math.), the sexagenary scale.

Proceeding by sixes; sextuple; -- applied especially to a system of arithmetical computation in which the base is six.

To subtract by arithmetical operation; to deduct. If, out of that infinite multitude of antecedent generations, we should subduce ten. Sir M. Hale.

Arithmetical subtraction. Sir M. Hale.

A problem to be solved, or an example to be wrought out. Macaulay. A sum in arithmetic wherein a flaw discovered at a particular point is ipso facto fatal to the whole. Gladstone. A large sheet of paper . . . covered with long sums. Dickens. Algebraic sum, as distinguished from arithmetical sum, the aggregate of two or…

es for practice; to inculcate as true or important; to exhibit impressively; as, to teach arithmetic, dancing, music, or the like; to teach morals. If some men teach wicked things, it must be that others should practice them. South.

r numbers (Math.), the series of numbers formed by the successive sums of the terms of an arithmetical progression, of which the first term and the common difference are 1. See Figurate numbers, under Figurate.

Of or pertaining to a unit or units; relating to unity; as, the unitary method in arithmetic.