1. Cross-multiplicationIn 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. For an equation like the following: (note that "b" and "d" must be non-zero for these to be real fractions) one can cross-multiply to get
Read “Cross-multiplication” on English Wikipedia
Read “帰一算” on Japanese Wikipedia
Read “Cross-multiplication” on DBpedia
Read “Cross-multiplication” on English Wikipedia
Read “帰一算” on Japanese Wikipedia
Read “Cross-multiplication” on DBpedia
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