Mathematician qi Liang

Problem analysis: according to the meaning of the question, the volume of the rotating body 2 is the volume of the rotating body 2, because the volume of half a big ball MINUS the volume of two and a half small balls is? So the answer is B.

Comments: Understanding the solution of volume, according to the principle of ancestral division, the solution of plane graphics with the same area corresponds to the same volume, which is creative and cultivates students' ability to analyze and solve problems.

Which is better, Beijing Normal University Edition or People's Education Edition?

Optimization of Mathematics Teaching

We are good at math. Multiplied by me is equal to good. What number do you represent? What is the specific answer? Thank you.

What are the latest mathematics teaching theories in primary schools?

Timeline planning of master of financial mathematics at the University of Chicago, USA

What is the answer to the seventh question in Unit 6, Book 1 of Pingliang Math Workbook?

Mathematics textbook for sixth grade competition

1998 How many points did the children's class in the experimental class of extraordinary education in Northeast Yucai School get in the math test?

Analysis of students' own grades in the third month exam

I am a senior three student. There are few single choice and fill-in-the-blank errors in the first and second modules of mathematics, and there are many errors in the third module. Why?