666x552+448x552+448x114和99999x9+19x11111巧算

如题所述

第1个回答  2015-11-25
666x552+448x552+448x114
=666x552+448x(552+114)
=666x552+448x666
=666x(552+448)
=666x1000
=666000

99999x9+19x11111
=11111x81+19x11111
=(81+19)x11111

=100x11111
=1111100本回答被网友采纳