55X45十45X45用简便方法计算?

2025-02-24 22:19:17
推荐回答(4个)
回答1:

55X45十45X45
=45×(55+45)
=45×100
=4500

回答2:

=45(55+45)
=45x100
=4500

回答3:

回答4:

45(55+45)