Where can I download a good math textbook?

Question

Books

tell me a good author or a book on mathematics for grades 5-11

Answer 1

Starting from the 5th grade, the best and classic textbook for monsters of mathematics is any collection of problems edited by Scanavi. Some with solutions, some without. There are simple problems, there are problems for applicants to universities, there are Olympiad problems, there is a golimy theory.
All books by this author are an undeniable preparatory level in mathematics for a student who somehow sees himself in the future associated with mathematical sciences.
And now life is such that all promising technologies, professions, sciences, everything that is in demand - was, is and will be connected with mathematics. Scanavi is a must have!
Added:
Maybe they are too complex for a modern program? Now in schools, courses of in-depth study of mathematics do not give the volume that was given earlier in regular school courses. All this is debatable. Schools are different, requirements are different.
But mathematics remains mathematics, the collections of Scanavi (still Soviet publications) just contain the basic and monolithic foundation of a fairly STRONG mathematical training.
Another answer: read the QUANT magazines that were published in the USSR, the reference book Bronstein, Semendyaev, Korn. The collections of Danko and Kozhevnikov will be of interest to high school students and first-year students.
In fact, I have recently come across so many modern collections and textbooks, and in terms of knowledge base they are inferior to those that were in the USSR.
Learn and love mathematics in all its manifestations, times, textbooks.
The knowledge that you lack, just google and look in other books and Internet resources, including foreign sites.

Answer 2

In principle, for the most part, all known classical textbooks / problem books have been cited.
Skanavi, Vygodsky - Soviet classics. Although, Skanavi, in my opinion, still became a little rustic. I have no idea what is now with the introduction of the USE and what tasks, but a few years before its introduction, all topics and various tasks (tasks with a parameter, the majorant method, the Bezout theorem, etc.) did not cover the plus before the USE at many strong universities there were own tasks that could be solved quickly only by seeing them before, i.e. as a rule by attending specific preparatory courses or having literature from these courses.
Plus, work out algorithmic solutions (for example, always start, regardless of seeming simplicity, by finding the ODZ and the solution area, shrinking / not shrinking the solution area when dividing by a polynomial, etc.)
In addition, the Kvant magazine is really good and is still published in affiliated structures of the Moscow Institute of Physics and Technology, as far as I remember.
Of the lesser known:
There is a good textbook by Shabunin (MIPT), because. the reissue is quite new, the author himself is still alive, then the material is quite fresh and puts the brains in place well.
A very good book, the title, if memory serves, "In search of a solution" is a Soviet book that is a collection of small mathematical studies for schoolchildren. Unfortunately, I can't remember the year of publication or the author more specifically.
Rademacher's Numbers and Figures is a rather interesting work that is quite possible for grades 10-11 of the school, at least to get acquainted. In fact, a collection of sketches, if there is interest, it will be useful.
Is it worth reading the history of mathematics and the emergence and refinement of concepts and so on? as it often helps to understand why the original concepts now look like this and not otherwise, and what the main idea is. Because behind the modern formal language of mathematics it is not always easy to grasp what lay at the basis of a theory or idea.

Answer 3

In school algebra and geometry, there are old and recognized as the best classical textbook(s) by Kiselyov:
Old Soviet textbooks (download
)

Answer 4

Hello. Look at stavcur.ru There are a lot of didactic and practical materials on mathematics for different levels of knowledge

Answer 5

Hello. The spacemath.xyz resource publishes math lessons in an easy and accessible form, but they are most likely intended for dummies who have little understanding in mathematics