Mathematics is difficult for everyone, but it's not that difficult. It's simple. Here is a trick: as long as you listen carefully in class and look at the questions carefully, you will find that mathematics is particularly easy to learn, simple and not difficult at all.
We have learned a lot this year. Knowing the units of positive numbers and negative numbers, I know that China mathematician Liu Wei put forward the concepts of positive numbers and negative numbers more clearly when commenting on Nine Chapters of Arithmetic. In his calculation, he stipulated that "positive calculation is red and negative calculation is black", that is, red calculation means positive number and black calculation means negative number. This record is seven or eight hundred years earlier than that of foreign countries. From here we can see the role of positive and negative numbers. There are decimals for checking eyesight on the eye chart. Now China uses the national visual acuity chart. When the test result is equal to or greater than 5.0, the vision is normal and less than 5.0. You know that vision, right? If you are not nearsighted, you should also pay attention to eye hygiene!
When two numbers are divided, if the divisible quotient is not obtained, there will be finite decimals and infinite decimals, and the number of digits in the decimal part is limited, which is called finite decimals. The decimal part has infinite digits and is an infinite decimal. Cyclic decimal is infinite decimal. The decimal part of a cyclic decimal, and the numbers that appear repeatedly in turn, are the cyclic parts of this decimal. Do you know what finite decimal and infinite decimal are?
Mathematics knowledge is everywhere, and mathematics is not difficult! Let's learn math well and become the second China in China in the future!