如题所述
第1个回答 2023-02-13
121×99
=121×100-121×1
=12100-121
=12100-200+79
=11979
11×990
=10×990+1×990
=9900+990
=10890<11979
121×99(>)11×990本回答被网友采纳
=121×100-121×1
=12100-121
=12100-200+79
=11979
11×990
=10×990+1×990
=9900+990
=10890<11979
121×99(>)11×990本回答被网友采纳