Explaining the Cross-Multiplication Algorithm

Many high-school mathematics teachers have likely been asked by a student, "Why does the cross-multiplication algorithm work?" It is a commonly used algorithm when dealing with proportion problems, conversion of units, or fractional linear equations. For most teachers, the explanation usua...

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Veröffentlicht in:	Mathematics Teaching 2009-01 (212), p.8
1. Verfasser:	Handa, Yuichi
Format:	Artikel
Sprache:	eng
Schlagworte:	Algebra Algorithms Equations (Mathematics) Fractions Geometric Concepts High Schools Mathematical Concepts Mathematical Logic Mathematics Instruction Mathematics Teachers Multiplication Secondary School Mathematics Students Teachers Validity
Online-Zugang:	Volltext
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