Question

五十五点五乘以四十四点五加五十五点五乘以五十六点五减五十五点五怎么简便计？

Answer 1

运用乘法分配律进行计算，并把最后一个55.5当作55.5×1。
55.5×44.5+55.5×56.5
–55.5
=55.5×(44.5+56.5–1)
=55.5×100
=5550

Answer 2

55.5×44.5+55.5×56.5-55.5

=55.5×44.5+55.5×56.5-55.5×1

=55.5×（44.5+56.5-1）

=55.5×100

=5550