(1) Everything counts. Pythagoras

(2) Geometry has no king. -Euclid

(3) Mathematics is the language used by God to write the universe. Galileo

I am determined to give up that abstract geometry. In other words, I don't think about the problems that are only used to practice my thoughts. I did this to study another kind of geometry, that is, geometry aimed at explaining natural phenomena. -Descartes (René 1596- 1650)

(5) Mathematicians try to find a certain sequence of prime numbers on this day. We have reason to believe that this is a mystery, and the human mind will never be able to see it. -Euler

(6) Some beautiful theorems in mathematics have the following characteristics: they are easy to be induced from facts, but their proofs are extremely hidden. Mathematics is the king of science. Gauss

(7) This is the advantage of a well-structured language, and its simplified symbols are often the source of abstruse theories. -Pierre-Simon Laplace (1749- 1827)

2, the application of mathematics in life

Once, my mother baked a cake, and two cakes could be put in the pot. I thought, isn't this a math problem? It takes two minutes to bake a cake, one minute in front and one minute in the back. At most, two cakes are put in the pot at the same time. How many minutes does it take to bake three cakes at most? I thought about it and came to the conclusion that it takes 3 minutes: first, put the first cake and the second cake into the pot at the same time, 1 minute later, take out the second cake, put the third cake and turn the first cake over; Bake again 1 min, so that the first cake is ready. Take it out. Then put the reverse side of the second cake on it, and turn the third cake upside down at the same time, so it will be all done in 3 minutes.