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Cross-multiplication

Index Cross-multiplication

In mathematics, specifically in elementary arithmetic and elementary algebra, given an equation between two fractions or rational expressions, one can cross-multiply to simplify the equation or determine the value of a variable. [1]

Table of Contents

  1. 26 relations: Algebraic fraction, Biometrika, Charles Darwin, Clearing denominators, Cocker's Arithmetick, Cross-ratio, Elementary algebra, Elementary arithmetic, Equation, Euclidean geometry, Fraction, Golden Rule, Karl Pearson, Lewis Carroll, Lowest common denominator, Mathematics, Odds ratio, Ratio, Similarity (geometry), Sylvie and Bruno, The Mad Gardener's Song, Thirteen Colonies, Trairāśika, Turn (angle), Unitary method, William Darwin Fox.

  2. Fractions (mathematics)

Algebraic fraction

In algebra, an algebraic fraction is a fraction whose numerator and denominator are algebraic expressions. Cross-multiplication and algebraic fraction are fractions (mathematics).

See Cross-multiplication and Algebraic fraction

Biometrika

Biometrika is a peer-reviewed scientific journal published by Oxford University Press for the.

See Cross-multiplication and Biometrika

Charles Darwin

Charles Robert Darwin (12 February 1809 – 19 April 1882) was an English naturalist, geologist, and biologist, widely known for his contributions to evolutionary biology.

See Cross-multiplication and Charles Darwin

Clearing denominators

In mathematics, the method of clearing denominators, also called clearing fractions, is a technique for simplifying an equation equating two expressions that each are a sum of rational expressions – which includes simple fractions.

See Cross-multiplication and Clearing denominators

Cocker's Arithmetick

Cocker's Arithmetick, also known by its full title "Cocker's Arithmetick: Being a Plain and Familiar Method Suitable to the Meanest Capacity for the Full Understanding of That Incomparable Art, As It Is Now Taught by the Ablest School-Masters in City and Country", is a grammar school mathematics textbook written by Edward Cocker (1631–1676) and published posthumously by John Hawkins in 1678.

See Cross-multiplication and Cocker's Arithmetick

Cross-ratio

In geometry, the cross-ratio, also called the double ratio and anharmonic ratio, is a number associated with a list of four collinear points, particularly points on a projective line.

See Cross-multiplication and Cross-ratio

Elementary algebra

Elementary algebra, also known as college algebra, encompasses the basic concepts of algebra.

See Cross-multiplication and Elementary algebra

Elementary arithmetic

Elementary arithmetic is a branch of mathematics involving addition, subtraction, multiplication, and division.

See Cross-multiplication and Elementary arithmetic

Equation

In mathematics, an equation is a mathematical formula that expresses the equality of two expressions, by connecting them with the equals sign.

See Cross-multiplication and Equation

Euclidean geometry

Euclidean geometry is a mathematical system attributed to ancient Greek mathematician Euclid, which he described in his textbook on geometry, Elements.

See Cross-multiplication and Euclidean geometry

Fraction

A fraction (from fractus, "broken") represents a part of a whole or, more generally, any number of equal parts. Cross-multiplication and fraction are fractions (mathematics).

See Cross-multiplication and Fraction

Golden Rule

The Golden Rule is the principle of treating others as one would want to be treated by them.

See Cross-multiplication and Golden Rule

Karl Pearson

Karl Pearson (born Carl Pearson; 27 March 1857 – 27 April 1936) was an English eugenicist, mathematician, and biostatistician. He has been credited with establishing the discipline of mathematical statistics. He founded the world's first university statistics department at University College London in 1911, and contributed significantly to the field of biometrics and meteorology.

See Cross-multiplication and Karl Pearson

Lewis Carroll

Charles Lutwidge Dodgson (27 January 1832 – 14 January 1898), better known by his pen name Lewis Carroll, was an English author, poet, mathematician, photographer and Anglican priest.

See Cross-multiplication and Lewis Carroll

Lowest common denominator

In mathematics, the lowest common denominator or least common denominator (abbreviated LCD) is the lowest common multiple of the denominators of a set of fractions. Cross-multiplication and lowest common denominator are fractions (mathematics).

See Cross-multiplication and Lowest common denominator

Mathematics

Mathematics is a field of study that discovers and organizes abstract objects, methods, theories and theorems that are developed and proved for the needs of empirical sciences and mathematics itself.

See Cross-multiplication and Mathematics

Odds ratio

An odds ratio (OR) is a statistic that quantifies the strength of the association between two events, A and B. The odds ratio is defined as the ratio of the odds of event A taking place in the presence of B, the and odds of A in the absence of B. Due to symmetry, odds ratio reciprocally calculates the ratio of the odds of B occurring in the presence of A, and the odds of B in the absence of A.

See Cross-multiplication and Odds ratio

Ratio

In mathematics, a ratio shows how many times one number contains another.

See Cross-multiplication and Ratio

Similarity (geometry)

In Euclidean geometry, two objects are similar if they have the same shape, or if one has the same shape as the mirror image of the other.

See Cross-multiplication and Similarity (geometry)

Sylvie and Bruno

Sylvie and Bruno, first published in 1889, and its second volume Sylvie and Bruno Concluded published in 1893, form the last novel by Lewis Carroll published during his lifetime.

See Cross-multiplication and Sylvie and Bruno

The Mad Gardener's Song

"The Mad Gardener's Song" is a poem by Lewis Carroll that appears in his book Sylvie and Bruno (1889, 1893).

See Cross-multiplication and The Mad Gardener's Song

Thirteen Colonies

The Thirteen Colonies were a group of British colonies on the Atlantic coast of North America during the 17th and 18th centuries.

See Cross-multiplication and Thirteen Colonies

Trairāśika

Trairāśika is the Sanskrit term used by Indian astronomers and mathematicians of the pre-modern era to denote what is known as the "rule of three" in elementary mathematics and algebra. Cross-multiplication and Trairāśika are fractions (mathematics).

See Cross-multiplication and Trairāśika

Turn (angle)

The turn (symbol tr or pla) is a unit of plane angle measurement that is the angular measure subtended by a complete circle at its center.

See Cross-multiplication and Turn (angle)

Unitary method

In elementary algebra, the unitary method is a problem-solving technique taught to students as a method for solving word problems involving proportionality and units of measurement.

See Cross-multiplication and Unitary method

William Darwin Fox

The Reverend William Darwin Fox (23 April 1805 – 8 April 1880) was an English clergyman, naturalist, and a second cousin of Charles Darwin.

See Cross-multiplication and William Darwin Fox

See also

Fractions (mathematics)

References

[1] https://en.wikipedia.org/wiki/Cross-multiplication

Also known as Cross Multiplication, Cross Multiply, Cross Multiplying, Cross-Multiplying, Cross-multiply, Cross-your-heart method, Means extremes, Rule of 3 (math), Rule of 3 (mathematics), Rule of Three (Math), Rule of Three (mathematics), Rule of proportion, Rule of three sum, Solving proportions.