1, according to the longitude of the two places, explain the east-west direction: the two comparison places are both east longitude, so the longitude value in the east is large and the longitude value in the west is small; The two comparison places are both west longitude, so the smaller longitude value is in the east and the larger longitude value is in the west; When the two comparison places are east longitude and west longitude, the sum of the longitudes of the two places should be used to mark the east-west direction.
2. Explain the north-south direction according to the latitude number: the two comparison places are north latitude, with the minimum value in the north and the maximum value in the south; The two comparison places are north latitude and south latitude. North latitude is in the north and south latitude is in the south. East longitude east, west longitude west, Dongda East, Nishionishi. North and South Latitude, North Latitude, South Latitude, North North, South South.
3. East-west direction, according to the longitude. The large value is in the east and the small value is in the west. Judging the north-south direction according to the latitude number. The small value is in the north and the large value is in the south. The formulas for judging the north-south direction are: north latitude, south latitude, north north, south south. The formulas for judging the east-west direction are: east longitude, west longitude, east university and west university.
The relevant knowledge of the formula is as follows:
Formula is the abbreviation of initials, finals, tones, syllables and punctuation marks in Chinese Pinyin. There are many kinds of formulas, such as multiplication formula, multiplication formula, multiplication table, square root formula and so on. The multiplication formula is a group of four sentences, rhyming with one word instead of multiple words, which is convenient for memory and communication.
2. The multiplication formula is characterized by neat rhyming and easy to remember. The multiplication formula is the wisdom crystallization of multiplication operation in China's ancient calculation. Since the Spring and Autumn Period and the Warring States Period, this formula has been circulated for more than two thousand years. Multiplication table generally refers to 99 multiplication table, also called "99 songs" and "99 multiplication table". This is a popular children's ballad for learning mathematics in China.
3. The 99 multiplication table is a form of China's traditional multiplication formula, which first appeared in Xunzi, and it is the summary and generalization of ancient multiplication operations in China. The multiplication formula table is as follows: "1 1 gets one, 12 gets two, 13 gets three ... 18 gets eight, 19 gets nine ...", where "one" and "nine" are used.
4.99 multiplication table is the summary and generalization of China's ancient multiplication operation, which embodies the regularity and simplicity of mathematical operation and is of great help to improve the speed and accuracy of mathematical operation. The multiplication table is not only applicable to multiplication, but also to division. In ancient mathematics, formulas were called "calculating classics".
5. It is the result of continuous summarization and innovation by ancient mathematicians, and it is an important part of ancient mathematical culture in China. Besides multiplication formula and division formula, there are addition formula and subtraction formula. These formulas are all part of the basic knowledge of mathematics and basic operation skills, which is of great significance for cultivating and improving people's mathematical literacy.