199900+99+99999×99999简便运算

问题描述:

199900+99+99999×99999
简便运算

199900+99+99999×99999
=199999+99999*99999
=100000+99999+(100000-1)*99999
=100000+99999+100000*99999-99999
=100000+9999900000
=10000000000

你丫抽了1·

199900+99+99999×99999
解:原式=199999+(100000-1)×(100000-1)
=199999+100000×100000-10000-10000+1

=199999+10000000000-200000+1
=199999+10000000000-199999
=199999-199999+10000000000
=10000000000

199900+99+99999×99999
=199999+99999*99999
=100000+100000*99999
=10000000000

原式=100000+99999+99999*99999
=100000+99999*(1+99999)
=100000+100000*99999
=100000*100000
=10000000000