99999×22222 和 72×14.3÷0.8÷1.1×0.01两道题怎么简便计算

99999*22222=(100000-1)*22222=2222200000-22222=2222177778

72×14.3÷0.8÷1.1×0.01=(72/0.8)*(14.3/1.1)*0.01=90*13*0.01=11.7

99999*22222=(100000-1)*22222=2222200000-22222=2222177778

72×14.3÷0.8÷1.1×0.01=(72/0.8)*(14.3/1.1)*0.01=90*13*0.01=11.7
转换一下就行了

99999×22222
=(100000-1)×22222
=100000×22222-22222
=2222200000-22222
=2222177778

72×14.3÷0.8÷1.1×0.01
=(72÷0.8)×(14.3÷1.1)×0.01
=90×13×0.01
=11.7

99999*22222=(100000-1)*22222=2222200000-22222=2222177778

72*14.3÷0.8÷1.1*0.01=(8*9)*(11*13÷10)*(10/8)*(10/11)*0.01=(约分后)9*13*0.1=11.7