Current location - Training Enrollment Network - Mathematics courses - Summary of Unit 5, Volume 1, Grade 5, Mathematics People's Education Edition
Summary of Unit 5, Volume 1, Grade 5, Mathematics People's Education Edition
Mathematics People's Education Edition, Grade Five, Volume One, Unit 5 Summary, Unit 5 Graphic Area (2)

1, the method of finding the combined graphic area:

(1) segmentation method: divide the graphics reasonably to form basic graphics, and the sum of the basic graphics areas is the area of the combined graphics. (summation method)

(2) Supplementary method: the missing part of the figure is supplemented to form several basic figures, and the basic figure area-supplementary figure area = combined figure area.

2. Estimation of irregular figure area:

(1) method of counting cells.

(2) Irregular figures are regarded as approximate basic figures, and the area is estimated.

The chicken and the rabbit are in the same cage;

1, list method.

2. Hypothetical method

3. Column equation

Law in lattice: ellipsis