First, the numbers should be written separately, not Lian Bi; 6, 8, 9, 0, write as round as possible.

Second, try to keep all the numbers tilted about 45 degrees to the right.

Three, the height of the number should be one-half to two-thirds of the height of the account book table. Among them, 6 is higher than other figures, but generally does not exceed the table; 7 and 9 are slightly lower than other figures, and the lower part accounts for about one-third of the upper part of the next line.

Fourth, there should be no gaps when writing 0, 8 and 9, and the circle should be sealed; The two perpendicular lines of 4 should be obliquely parallel and cannot be connected; When writing 2, you can't write it as a "Z", but draw a circle on the lower corner.

Arabic numerals consist of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 * * * 10 counting symbols. Take the position value method, the high position is on the left, the low position is on the right, and the writing is from left to right.

With the help of some simple mathematical symbols (decimal point, minus sign, percent sign, etc. ), this system can clearly represent all rational numbers. In order to express extremely large or extremely small numbers, people have created scientific notation on the basis of Arabic numerals.