45X99十45简便方法怎么做老师们

Question

如题所述

Answer 1

=45×(99+1)
=45×100
=4500

Answer 2

45✖️99+45✖️1
=45✖️（99+1）
=4500

Answer 3

45*（99+1）=4500

Answer 4

45×(99+1)=450

Answer 5

45×99+45×1
=45×（99+1）
=45×100
=4500