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401×18怎样简便计算

401×18 =(400+1)×18 =400×18+1×18 =7200+18 =7218 望采纳。

400×25+25

363+401 =363+(400+1) =363+400+1 =763+1 =764

28872

0.75×401 =(400+1)×0.75 =400×0.75+1×0.75 =300+0.75 =300.75

原式 =401² =(400+1)² =400²+1²+2x400x1 =160000+1+800 =160801 供参考。

401×0.32简便计算 401×0.32简 =0.32*(400+1) =0.32*400+0.32 =128.32

简便方法计算 401x25 =400×25+25 =10000+25 =10025

请简便计算 401×0.32 =400×0.32+0.32 =128+0.32 =128.32

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