therefore
Finally, the small notebook is less than the average of three people (6+6)/3= 12/3=4.
therefore
The sum of the money given by Xiao Dingding and Xiao Pang is the money of these four books.
therefore
The unit price of this book
=(5.4+5.4)/4
= 10.8/4
=2.7 yuan
Author: Gu.
With the changes of the times, human science and technology have made more and more progress. On the grounds that "the world needs techn