African Mathematics: From Bones to Computers by Mamokgethi Setati, Abdul Karim Bangura

By Mamokgethi Setati, Abdul Karim Bangura

This is often the 1st complete textual content on African arithmetic that may be used to deal with a few of the frustrating matters during this quarter. those concerns contain attitudes, curriculum improvement, academic switch, educational fulfillment, standardized and different checks, functionality components, pupil features, cross-cultural transformations and reviews, literacy, local audio system, social type and variations, equivalent schooling, instructing tools, wisdom point, academic instructions and rules, transitional faculties, comparative schooling, different matters akin to physics and social reviews, surveys, expertise, academic learn, instructor schooling and skills, educational criteria, instructor effectiveness, lesson plans and modules, instructor features, directions, software effectiveness, software assessment, African tradition, African heritage, Black reviews, type actions, academic video games, quantity structures, cognitive skill, overseas impression, and basic strategies. What unifies the chapters during this publication can seem quite banal, yet many mathematical insights are so visible and so basic that they're tough to soak up, savor, and exhibit with clean readability. a few of the extra simple insights are remoted by way of money owed of investigators who've earned their contemporaries' appreciate.

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Two strips of a palm leaf are used to weave a button. Once an initial knot is made, one continues, on the backside, to weave “one-over-one-under,” building up successive layers of the button, until it has become more or less cubic. One may arrive at the conclusion that C=A+B that is, one arrives at the Pythagorean Theorem. One can also join the square designs to form a pattern in such a way that the oblique lines are continued. Comparing the areas, one may find the following: S + T = U. e. a rotational symmetry of 90° occurs frequently.

The double remen equals the diagonal of a square whose side equals one cubit. Changing the units of measurement from cubits to double remens would double the area of a figure. Finally, in his article, “Egyptian Fractions” (1981), Charles Rees uses the Egyptian preference for dealing with unit fractions, with the exception of the case of 2/3, as a starting point for certain problems in Number Theory. He provides several proofs to show that every fraction can be represented as a sum of unit fractions that vary in the number of fractions produced and the maximum size of the denominators.

Some languages continue to add one, two, etc. to the word for 15 until 20 is reached. ” The same method is repeated by adding to the word for 20 to form the numerals from 21 to 39. The number 40 is expressed as “two men complete,” and 100 is “five men complete”—in essence, all of the digits on the hands and feet have been counted five times (Zaslavsky 1973/1999:42–43). And as Delafosse points out, a Malinke expression for 40 is dibi, meaning “a mattress,” the union of the 40 digits, as the husband and wife lie on the same mattress and have a total of 40 digits between them (1929:389).

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