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Dence, Joseph B.; Dence, Thomas P. – Mathematics Teacher, 1993
Presents an algorithm to estimate pi by approximating a unit circle with a sequence of inscribed regular polygons. Demonstrates the application of the algorithm with a hand-held calculator and an Apple computer. Provides a program to calculate pi in Pascal programing language. (12 references) (MDH)
Descriptors: Algorithms, Area, Calculators, Computation

Lee, Kil S. – School Science and Mathematics, 1991
Traditional methods of teaching addition include algorithms that involve right-to-left procedures. This article describes efficient procedures for left-to-right addition and subtraction involving computation and computational estimation that reflect children's natural behaviors observed during activities with unifix cubes. (MDH)
Descriptors: Addition, Algorithms, Cognitive Development, Cognitive Processes