Title number
In 2006
In 2007
the year of 2008
In 2009
20 10 year
20 1 1
1
absolute value
Corresponding thing
arithmetic square root
reciprocal
absolute value
Corresponding thing
2
Three-sided diagram
Scientific symbol
Idempotent operation
Scientific symbol
Scientific symbol
effective digit
Three-sided diagram
three
approximate value
Three-sided diagram
Scientific symbol
approximate value
Three-sided diagram
Algebraic expression operation
Scientific symbol
four
Axial symmetry
Axial symmetry
Three-sided diagram
Axisymmetric and centrosymmetric
Functional image
Algebraic expression operation
five
number axis
Solution set of inequality system
Trilateral relation of triangle
Axial symmetry
Central symmetry
proportional relation
Statistics and probability
median
six
way
median
Discounted sales
Mode and median
average number
Simplification of Fractions (Factorization and Simplification)
Axisymmetric and centrosymmetric
Discounted sales
seven
Images of inverse proportional function and linear function
discrepancy
Know 1 ten thousand
Discounted sales
Inequality, number axis
Judging triangle similarity
eight
Inequality application problem
Square, the non-negative number of absolute value
Quadrilateral theorem
Properties of quadratic function
Explore the law
Probability; possibility
nine
similar triangles
Two straight lines are parallel
Translation of quadratic function
Solving inequality system
triangle
Unequal judgment
10
Quadrilateral trigonometric function
Images of linear functions and inverse proportional functions
Diamond, rotation, arc length
The properties of rectangle, solving right triangle
Probability; possibility
quadratic function
1 1
Probability; possibility
Probability; possibility
Probability; possibility
Power and the same basic power
Application of Fractional Equation
Propositional judgment: circle, equation, function
12
Addition and subtraction of fractions
Decomposition factor
Factorization-raising common factor and formula method
Compare the counterexample function, the area of the rectangle.
Inverse proportional function, circle
triangle
13
Discrimination of special quadrilateral
Definition of similar projects
Properties of inverse proportional function and linear function
Probability; possibility
Decomposition factor
Decomposition factor
14
Find a pattern
Midline theorem of right triangle
Axisymmetric and rectangular coordinate systems
Solving right triangle
parallelogram
circle
15
Discrimination of right triangle
Find a pattern
Find a pattern
Explore the law
Find the number of cubes from the three views
Find a pattern
16
The Negative Exponent of Trigonometric Function Value of Power Special Angle
Zero exponential square root
Negative exponent, trigonometric function value of special angle, square root, zero exponent
Absolute value, special value trigonometric function, cubic root, zero exponent
Isosceles triangle, right triangle
trigonometric function
trigonometric function
17
Solve fractional equation
Solving inequality system
Addition, subtraction, multiplication and division of fractions
Absolute value, square root, negative exponential power, zeroth power of nonzero numbers.
Negative exponent, trigonometric function value, power of 0, radical
Calculation of negative exponent, trigonometric function value, power sum of zero and root formula
18
Trapezoidal isosceles triangle right triangle
Trapezoidal congruent triangles
Isosceles trapezoid, parallelogram and 30 right triangle
Solve fractional equation
Simplified score evaluation
solve an equation
19
frequency table
bar chart
Frequency distribution histogram
way
Bar and fan charts
Broken line statistical chart and bar chart
Frequency distribution histogram and fan-shaped statistical chart
Frequency distribution histogram and fan-shaped statistical chart
20
1, unary linear equation
2. On the maximum value of the profit quadratic function.
Use trigonometric function to indicate whether the ship will hit the rocks.
Tangent, similar triangles and Trigonometric Function of a Circle
The outer corners of squares, congruent triangles and triangles.
Evaluation of triangle congruence sum
Circle, right triangle
2 1
Expression of parabola
similar triangles
Find the vertex coordinates of isosceles triangle
Engineering problems
fractional equation
Binary linear equations, binary linear inequalities, scheme selection
Circle, right triangle, acute triangle, similar triangles.
Application of quadratic function
Folding problem, triangle similarity
22
Vertical theorem
Congruent triangle
pythagorean theorem
similar triangles
Height theorem of right triangle
tangent
Moving point
square
pythagorean theorem
Analytical formula for finding parabola
Rationalize denominator
Find the analytic expression of quadratic function; Find the coordinates of a vertex of the parallelogram on the quadratic function image; The tangent of the circle and the quadratic function, find a point on the quadratic function to maximize the triangle area.
Properties of Binary Linear Equations, Indefinite Equations and Linear Functions
Parabolic analytical formula, point coordinates
Properties of Binary Linear Equations, Indefinite Equations and Linear Functions
23
1, coordinates of intersection point of linear function and quadratic function
2. Find the maximum area by knowing the perimeter of the sector.
3. similar triangles
4. Pythagorean theorem
Similar triangles, quadratic function, isosceles triangle, graphic area.
Circle, triangle, trigonometric function, similarity, rectangular coordinate system
1, coordinates of intersection point of linear function and quadratic function
2. Quadrilateral perimeter
3. similar triangles
4. Pythagorean theorem