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A Glossary of Mathematical Terms - R

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Range

In a set of data it is the difference between the largest and
the smallest value of data.

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Ratio

The quotient of two quantities.

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Reciprocals (Multiplicative inverses)

Two numbers whose product is 1.

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Reduction of a fraction

The process of finding and removing all common factors between
the numerator and the denominator.

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Reflection

See Flip.

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Reflex (Concave)

See Angle and Polygon.

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Remainder

The difference of the dividend and the greatest multiple of the
divisor, which is less than the dividend.

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Repeating decimal

A decimal like 2.343434...

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Rhombus

A quadrilateral with equal sides.

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Root

Of an equation;

of a quantity (square root, cube root, ...).

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Round brackets ( )

See Parenthesis.

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Rounding

A process that replaces a number with a value closest to the
original, but with a specified number of decimal places or
digits: 37.39 rounded to the nearest tenth is 37.4; 123 rounded
to the nearest ten is 120.

copyright 2000 et seq. maddalena falanga & luciano battaia

first published on september 01 2003 - last updated on september 01
2003