If you want to know all the knowledge points in the chapter of the system of linear inequalities with one variable in the second volume of the first grade of junior high school, you'd better give me the kind of knowledge tree, for example: System of linear inequalities of one variable {1 2. (what is the solution of inequality) ……

A system of inequalities consisting of several univariate linear inequalities with the same unknown number is called a system of univariate linear inequalities
The common part of the solution set of all inequalities in a system of inequalities is called the solution set of the system of inequalities. The process of finding the solution set of the system of inequalities is called solving the system of inequalities
The knack of solving inequality
Greater than the greater (greatly greater); and;
For example: x > - 1
X>2
The solution set of inequality system is x > 2
Take the smaller one (the smaller one);
For example: X

When Xiao Ming read a book, he has read 55% of the whole book, 10 more pages than he didn't read. How many pages are there in this book?

A: this book has 100 pages

1200 ml = () CC

1200 ml = (1200) CC

Geometry proof in junior high school mathematics (parallelogram)

It's easy to do this problem with the same method. Method 1: Cr / / be intersects AQ with R, and the extension line of AB intersects T. it is proved that PR and BC intersect m, so that Q and R are the same point. There is CQ / / be. It is proved that PR and BC intersect m, PS / / AB intersect CT with S. Mayer's theorem: (AB / DB) * (DP / PC) * (EC / AE) = 1, then a

101-102+103-104+…… +How can 199-200 be regarded as a process

So simple, (101-102) + (103-104) +. + (199-200) = - 1x50 = - 50

Add proper operation symbol in the middle of five numbers and use two different formulas to make the equation 5 = 10

5*5-5-5-5=10
It's too easy
0?
Is that right?
Give me some points~-~
One point is OK~

What's the answer to the question I'll fill in in Lesson 12 of the fourth grade Chinese exercise book of the people's education press

Keep (ecological balance) solve (problem) study (principle) whimsical (command) (a lot of) energy (navigation) speed serious (Research) (Group) attack (easily) over

The sum of three consecutive odd numbers is 51. What are the solutions of these three odd numbers

Let the number in the middle be x, then the three numbers are X-2, x, x + 2
thus
x-2+x+x+2=51
x=17
So, 15, 17, 19

There are 840 TV sets and refrigerators in the home appliance market, of which TV sets account for one third of the total. Later, some TV sets were imported, and refrigerators account for the total number
Two fifths of the total, how many TV sets will be imported later?

Let X be the number of TV sets imported
840(1-1/3)=(840+x)2/5
The solution is x = 560
The number of TV sets imported is 560

The problem of finding rules in Mathematics
1, 4 out of 3, 2, 16 out of 3, 64 out of 7

4/3 8/4 16/5 32/6 64/7 128/8
The denominator is 3,4,5,6,7,8 and other natural numbers. The numerator is the second, third, fourth, fifth, sixth and seventh power of 2