Hebei Education Edition Eighth Grade Mathematics Textbook Catalogue
Chapter 13
One-dimensional linear inequality and one-dimensional linear inequality system
13. 1 inequality
Basic properties of inequality 13.2
13.3 one-dimensional linear inequality
13.4 unary linear inequality system
Chapter XIV Scores
14. 1 score
Multiplication and division of 14.2 fraction
14.3 decimal addition and subtraction
Chapter 15 Axisymmetric
15. 1 axis of symmetry in life
15.2 simple axisymmetric figure
Axisymmetric properties of 15.3
15.4 uses the axisymmetric design pattern.
15.5 isosceles triangle
Chapter 16 Pythagorean Theorem
16. 1 Pythagorean theorem
16.2 Identifying right-angled triangles by the quantitative relationship of sides
Application of Pythagorean Theorem 16.3
Chapter 17 Real Numbers
17. 1 square root
17.2 cube root
17.3 real number
17.4 Kaiping (vertical) square belt calculator
Operation of 17.5 real number
Chapter 18 Plane Cartesian Coordinate System
Determine the position of an object on a plane
18.2 plane cartesian coordinate system
18.3 graphics and coordinates
18.4 Solutions of Binary Linear Equations (Groups) and Coordinates of Points
Chapter 19 Random Events and Probability
19. 1 deterministic events and random events
19.2 possibility
19.3 Relationship between frequency and probability
Eighth grade math exercises
real number
(1) An integer has _ _ _ _ _ _ square roots, which are _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(2) Point _ _ _ _ _ _ _ on the axis of real number and number.
aa2(3))= _ _ _ _ _ _ _ _ _ _ _ _(a？ 0)= _ _ _ _ _ _ _(a？ 0，b？ 0) ).bb
(4) The steps of addition and subtraction of quadratic radicals are as follows: First, turn each quadratic radical into _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Cartesian coordinates/Cartesian coordinates
In the (1) plane rectangular coordinate system, the relationship between a point and its coordinates (ordered real number pairs) is _ _ _ _ _ _ _. A point P(a, b) in the plane rectangular coordinate system, when a >: 0, b>0, p is in the _ _ _ _ _ _ _ quadrant; When a<0, b>0 and P are in the _ _ _ _ _ _ _ quadrant; When A _ _ _ _ _ _ _ _ _ B _ _ _ _ _ _ _, P are in the third quadrant; When A _ _ _ _ _ _ _ _ _, B _ _ _ _ _ _ _, P are in the fourth pixel limit; When a=0, p is on _ _ _ _ _ _ _; When _ _ _ _ _ _ _ _, p is on the X axis, and vice versa.
(2) Binary linear equations have countless solutions, and each solution is a real number pair, corresponding to a point in the coordinate system. And these points constitute a _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Random events and probability
(1) We use a number P(A) to represent the possibility of random event A _ _ _ _ _ _ _ _ _ and call it the probability of event A. Generally speaking, if an experiment has n equal possible results and event A contains k results, we define P(A) = _ _ _ _.
(2) For any event A, its probability P(A) satisfies _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
(3) Some events can be calculated by reasonable calculation, and some events need to be estimated by experiments with _ _ _ _ _ _ _; When the number of experiments is enough, the frequency of event A is stable to its _ _ _ _ _ _ _ _ _, so we often use frequency to estimate the frequency of _ _ _ _ _ _ _ _ _ _ _.
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