cross-multiply Where an equation has fractions on both sides, it may be simplified by cross-multiplying. In fact both sides are multiplied by the product of the two denominators, so that an equation a/b = c/d rearranges to ad = bc.
cross-multiply
数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。