Titlebook: Mathematics; Owen Perry,Joyce Perry Book 1981 Palgrave Macmillan, a division of Macmillan Publishers Limited 1981 mathematics

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2947-2253 Overview: 978-1-349-05230-1Series ISSN 2947-2253 Series E-ISSN 2947-2261

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Integers,A number system consists of a set of numbers, operations such as addition and multiplication for combining the numbers, and mathematical laws to govern the use of the operations.

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Decimal Fractions,A fraction in the denary system of powers of ten is called a decimal fraction. It was shown earlier (page 3) that dividing a power of ten by ten decreases the index by one so that . . This can be extended to negative powers, so that . .

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The Use of Logarithm Tables, Slide Rules and Electronic Calculators,When a number is expressed as a power of ten the index is the logarithm of the number to the base ten. Every positive number can be written as a power of ten and the integral powers have been met already in the work on decimals.

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Acetaldehyde

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Common Fractions,s occupy positions between integers on the number line. In a common fraction (sometimes called a vulgar fraction) the two integers are written one above the other with a line between them, such as . meaning . .