用0，2，3，4，5组成三位数乘两位数的乘法算式，你能写出几个？你能写出乘积最大的算式吗？（人教版数学教科书四年级上册第50页）

数学题解答：

520×43=22360

430×52=22360

540×32=17280

530×42=22260

510×43=21930

……可以写出很多

乘积最大的是算式是520×43和430×52

方法：在总和一定的情况下，两个数越接近，积越大。

推荐阅读：
Learn from Business Entrepreneurs Who Take the Time to Train Oth　 The Story Of Aaron Swartz And How His Death Could Change Compute　 Smart Finance Tips for Bloggers　 8 Ways to Build Up Seed Money to Turn Your Blog into a Business　 Apple Reveals ARKit At WWDC　 Blogging From the Road: Japan Edition　 How to Redesign Your Blog for Improved User Experience　 Yes, It’s Possible to Grab Loans When Working as a Freelancer　 2017 Most Unique and Friendliest CMS for Small Businesses　 5 Easy Steps to Writing the Perfect Guest Post