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Peer reviewedWyvill, Ron – Mathematics in School, 1973
Modular arithmetic is used to find the frequency of Friday 13th's in any year. (MM)
Descriptors: Arithmetic, Elementary School Mathematics, Mathematical Applications, Mathematics
Peer reviewedJohnston, J. H. – Mathematics in School, 1972
After briefly presenting possible origins for the use of the decimal system for counting and the duodecimal (base twelve) system for many measures, a notational scheme using six positive'' digits and six negative'' digits is presented. Examples and algorithms using this set of digits for operations with whole numbers, fractions, and in…
Descriptors: Algorithms, Arithmetic, Mathematical Concepts, Mathematics
Peer reviewedMelrose, Jean; Rowe, Susan – Mathematics in School, 1989
Describes number strips, arrow diagrams, and grids for number operations. Provides diagrams for the activity materials. (YP)
Descriptors: Arithmetic, Educational Games, Elementary Education, Elementary School Mathematics
Peer reviewedHaigh, Gordon – Mathematics in School, 1990
Discusses a number series made from the multiplication of numbers to digits. Presents a number series for diverse multiplication numbers. (YP)
Descriptors: Arithmetic, Computation, Elementary Education, Elementary School Mathematics
Peer reviewedThwaites, G. N. – Mathematics in School, 1989
Discusses a counting system and number operations. Suggests six distinct areas in a "number" subject: one-to-one correspondences; simple counting process; complicated counting process; addition and multiplication; algorithms for the operations; and the decimal system. (YP)
Descriptors: Arithmetic, Computation, Elementary School Mathematics, Mathematical Concepts
Peer reviewedMcAuley, Joe – Mathematics in School, 1990
Provides methods of teaching negative number operations, including addition, subtraction, and multiplication. Presents examples and activities for the operations. (YP)
Descriptors: Addition, Arithmetic, Computation, Integers
