It is easy to conclude that this geometry has two layers. The number of cubes in the first layer can be obtained from the top view, and the possible number of cubes in the second layer can be obtained from the front view. Add them up. This geometry has at least1+1+1+2+2 = 7 cubes and at most 2+2+2+ 1 = 9 cubes.
This topic mainly examines the three views of geometry, examines students' mastery and flexible application ability of the three views, and also reflects the examination of spatial imagination ability.
When observing a geometric figure, if you look from different directions, you may see different results. Mathematically, we call the views of the object seen from the front, left and top of the object three views respectively. For geometric figures composed of cubes, we can collect information from its three views and judge the number of cubes.
The importance of learn mathematics:
1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.
2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.
3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.