55✖️99怎么简便计算？

Question

如题所述

Answer 1

55✖️99
=55✖️100-55
=5500-55
=5445

Answer 2

原式=55*(100-1)
=55*100-55*1
=5445

Answer 3

55×99=55×（100-1）=550-55=495本回答被网友采纳

Answer 4

55×100-55=5445

Answer 5

55×99
=55×(100-1)
=55×100-55×1
=5445