Beijing normal university printing plate seventh grade first volume mathematics teaching material catalogue
Chapter 1 Rich Graphic World (New)
1 Stereo graphics in life
2 unfold and fold
3 cut a geometry.
Look at the shape of an object from three directions.
Review and thinking
Review exercises
Chapter II Rational Numbers and Their Operations (New)
1 rational number
2-axis
3 absolute value
4 addition of rational numbers
5 subtraction of rational numbers
6 addition and subtraction mixed operation of rational numbers
7 multiplication of rational numbers
8 division of rational numbers
The 9th power of rational number.
10 scientific notation
Mixed operation of rational number 1 1
12 using calculator operation
Review and thinking
Review exercises
Chapter III Algebraic Expressions and Their Addition and Subtraction (New)
1 letters represent numbers.
2 algebraic expression
3 algebraic expression
Addition and subtraction of algebraic expressions
5 Explore and express the law
Review and thinking
Review exercises
Chapter IV Basic Plane Graphics (New)
1 line segments, rays and lines
2 Compare the lengths of line segments
3 jiao
Comparison from four angles
5 a preliminary understanding of polygons and circles
Review and thinking
Review exercises
The fifth chapter one yuan linear equation (new)
1 Understanding linear equations with one variable
2. Solve one-dimensional linear equation
By applying one-dimensional linear equation, the water tank becomes higher.
4 Discount sales by using linear equation of one variable
5 apply a linear equation of one variable? Project Hope? Give a benefit performance
6. Chasing Xiao Ming with a linear equation.
Review and thinking
Review exercises
Chapter VI Data Collection and Arrangement (New)
1 collection of data
2 Census and sampling survey
3 Representation of data
4 the choice of statistical chart
Review and thinking
Review exercises
Synthesis and Practice (New)
Explore the magical magic square
Pay attention to population aging
Make a rectangular box as big as possible without a lid.
Project learning (new)
Make a rectangular box as big as possible without a lid.
General comments (new)
Key knowledge of the first volume of seventh grade mathematics
Angle measurement
The measurement of angle has the following provisions: divide a right angle into 180 equal parts, and each equal part is an angle of 1 degree. The unit is degrees. Say, 1 degree? 1, n degrees? n .
Put 1? Divide the angle into 60 equal parts, each part is called 1 point angle, and 1 point is marked as? 1。
Put 1? Divide the angle into 60 equal parts, each part is called 1 sec, and 1 sec is called? 1。
1? =60? , 1? =60?
internal bisector
The ray from the vertex of an angle divides the angle into two equal angles. This ray is called the bisector of an angle.
Nature of angle
The size of the (1) angle has nothing to do with the side length, but only with the amplitude of the two rays that make up the angle.
(2) the size of the angle can be measured and compared, and the angle can participate in the operation.
Straight corners and rounded corners: The light rotates around its endpoints. When the ending edge and the starting edge are on a straight line, the angle formed is called a straight angle. The ending edge continues to rotate, and when it coincides with the starting edge, the angle formed is called fillet.
Polygon: A closed plane figure composed of several line segments that are not on the same line and are connected end to end is called polygon. A line segment connecting two nonadjacent vertices is called the diagonal of a polygon.
Starting from the same vertex of an N-polygon, we can draw (n-3) diagonal lines, and divide the N-polygon into (n-2) triangles by connecting this vertex with other vertices respectively.
Circle: On the plane, a line segment rotates around one endpoint, and the figure formed by the other endpoint is called a circle. The fixed endpoint O is called the center of the circle, and the length of the line segment OA is called the length of the radius (usually referred to as radius for short).