Proposes a method for solving a diffusion equation by a random-walk approximation technique which utilizes the complex intergration method of steepest descent. (SL)

Obtains the orbits with reference to the center of mass of two bodies under mutual universe square law interaction by use of the eccentricity vector which is equivalent to the Lenz vector within a numerical factor. (Author/SL)

Some forms of interviewing are reviewed briefly, with emphasis on a method of assessing the reliability of interview ratings. Ways for introducing validity and meaning to academic or employment selection procedures that use interview techniques are suggested. (LBH)

The author redefines basic numeracy as the ability to use a four-function calculator sensibly. He then defines "sensibly" and considers the place of algorithms in the scheme of mathematical calculations. (MN)

For journal availability, see EC 092 078.

Gives a simple but fuller account of the basis for accurately calculating temperature rise in calorimetry. Points out some misconceptions regarding these calculations. Describes two basic methods, the extrapolation to zero time and the equal area method. Discusses the theoretical basis of each and their underlying assumptions. (CW)

This section of the journal contains computational activities designed to be used with a calculator. These activities enable students to practice skills of estimation, skip counting, place value, and computation. (RH)

Provides several algorithms that use extended precision methods to compute large factorials exactly. The programs are written in BASIC and PASCAL. The approach used for computing N considers how large N is, how the built-in limitation on exact integer representation can be bypassed, and how long it takes to compute N. (JN)

Ways in which two children solve a division example are presented. The focus is on encouraging students to explore and develop ways of solving mathematics problems. (MNS)

Presents and analyzes data on the arithmetic procedures people use when shopping for groceries in American supermarkets. Reports that the way shoppers solve problems is closely related to the way they formulate problems: supermarket arithmetic does not begin with a well-defined problem that calls for a specific numerical answer. (KH)

Computation errors that may occur by expanded use of calculators are discussed. Potential errors with five exact arithmetic examples are described as they are translated into approximate processes. (MNS)

Discusses the meaning of calculation errors, describing two error types (truncation and roundoff errors). Examples of calculator calculations are given to illustrate the importance of an awareness of significant digits and the effects of errors that may lead user to a mistaken interpretation of calculated results or to faulty conclusions.…

Found that there was significantly improved achievement of students whose teachers received diagnostic error information from a microcomputer program compared to teachers who did not receive such information. Explanations for the improved achievement and implications for mathematics instruction are addressed. (JN)

Using the calculator to do addition and multiplication in base 2 is discussed, with the stress on how to change numbers from one base to another using the calculator. (MNS)

A learning disabled student was drilled on multiplication facts, with records of his performance used to help him reach mastery. A sequence in which the 0 facts, 1 facts, etc., are taught is used. (MNS)