Quote Notation

Quote notation is a representation of rational numbers for which the addition, subtraction, and multiplication algorithms are the same as for natural numbers, and division is easier than the usual division algorithm, and works in the same right-to-left direction as the other arithmetic algorithms. Arithmetic in quote notation produces exact answers, with no roundoff error. It was invented by Eric Hehner of the University of Toronto, and published in the SIAM Journal on Computation, v.8, n.2, May 1979, pp. 124–134. It is related to Kurt Hensel's p-adic numbers.