d . {\displaystyle a={\frac {bc}{d}}.} Another justification of cross-multiplication is as follows. Starting with the given equation a b = c d , {\displaystyle...

including Multiplication of two numbers, where it is read as "times" or "multiplied by" Cross product of two vectors, where it is usually read as "cross" Cartesian...

Multiplication (often denoted by the cross symbol ×, by the mid-line dot operator ⋅, by juxtaposition, or, on computers, by an asterisk *) is one of the...

product in a Künneth theorem A crossed product in von Neumann algebras A Cartesian product in set theory Cross-multiplication This disambiguation page lists...

Because matrix multiplication is such a central operation in many numerical algorithms, much work has been invested in making matrix multiplication algorithms...

matrix multiplication since matrix multiplication is associative. Three-dimensional Euclidean space with multiplication given by the vector cross product...

In mathematics, vector multiplication may refer to one of several operations between two (or more) vectors. It may concern any of the following articles:...

‡ Tally marks Check mark ✓ No symbol   ⃠ Mathematics Multiplication sign Cartesian product Cross product Subcultures Straight edge "What is Maru Batsu...

true when performing addition and multiplication on any real numbers, it can be said that "addition and multiplication of real numbers are associative operations"...

A multiplication algorithm is an algorithm (or method) to multiply two numbers. Depending on the size of the numbers, different algorithms are more efficient...

cross product is used to define the formula for the vector operator curl. The trick of rewriting a cross product in terms of a matrix multiplication appears...

In military science, force multiplication or a force multiplier is a factor or a combination of factors that gives personnel or weapons (or other hardware)...

that AH:CH is as HC:HB, i.e. a/h = h/b, from which we conclude by cross-multiplication that h2 = ab, and finally that h = a b {\displaystyle h={\sqrt {ab}}}...

is on the right. It is so straightforward it does not require any cross-multiplication rules. It employs just the basic juxtaposition of the inbreeding...

to the plane spanned by x and y, it is possible to find a cross product with a multiplication table (and an associated set of basis vectors) such that...

{b^{2}-4ac}}}}={\frac {-b+{\sqrt {b^{2}-4ac}}}{2a}}\,,} can be verified by cross multiplication, and similarly for the other choice of signs. It is sometimes convenient...

number.)" The document itself also refers to negative fractions. Cross multiplication 0.999... Multiple FRACTRAN Some typographers such as Bringhurst mistakenly...

required for other quantities of benzene can be calculated using cross-multiplication (the rule of three). For example, if 1.5 mol C6H6 is present, 11...

{\displaystyle \mathbb {H} .} Quaternions are not a field, because multiplication of quaternions is not, in general, commutative. Quaternions provide...

three (mathematics), also known as Golden Rule, a particular form of cross-multiplication in elementary mathematics Goldwater rule, an Ethics related rule...

in one's memory, it may be convenient to perform the sum of the "cross" multiplication product first, and then add the other two elements: ( a ⋅ d + b...

made of metal, wood or ivory and have a square cross-section. Each rod is engraved with a multiplication table on each of the four faces. In some later...

newly founded journal Biometrika. This rule of three referred to cross-multiplication, however, and not the statistical rule of three. To mark the centenary...

In mathematics, a product is the result of multiplication, or an expression that identifies objects (numbers or variables) to be multiplied, called factors...

then the multiplication ceases to be associative, but the ∗ may be removed from the multiplication table resulting in an octonion multiplication table....

respect to multiplication is called a multiplicative identity (often denoted as 1). These need not be ordinary addition and multiplication—as the underlying...

ideals Scalar multiplication Matrix multiplication Inner product, on an inner product space Exterior product or wedge product Multiplication of vectors:...

noncommutative operations. The idea that simple operations, such as the multiplication and addition of numbers, are commutative was for many years implicitly...

{1}{n}}\sum _{i=1}^{n}(X_{i}-\mu ).\\[8pt]\end{aligned}}} Meaning, (by cross-multiplication) n ⋅ ( X ¯ − μ ) = ∑ i = 1 n ( X i − μ ) {\displaystyle n\cdot ({\overline...

Turkic (Orkhon) d² and Old Hungarian b, and Katakana ナ na and メme. The multiplication sign (×), often attributed to William Oughtred (who first used it in...