Make sure the students grasp the method of calculating the parallelogram well by doing Exercise 1.
Make sure the students grasp the method of calculating the parallelogram well by doing Exercise 1.
通过书面练习第一题，巩固求平行四边形面积的计算能力。
Make sure the students grasp the method of calculating the parallelogram well by doing Exercise 1.
通过书面练习第一题，巩固求平行四边形面积的计算能力。