论文部分内容阅读
倒数,初一同学也很熟悉,但是用倒数巧妙地求解一些较难的题,就不一定都熟悉了,提供以下4题,供同学们练习.
In the countdown, the first classmates are also very familiar with, but using the countdown skillfully to solve some of the more difficult questions, they may not all be familiar with, provide the following 4 questions for the students to practice.