The correct way to write the number 8 is to make a semicircle from the upper right line to the left line, turn to the lower right line to make a circle and touch the right line. The lower line and the left line intersect the original line upwards, above the middle line, and finally, the line reaches a place near the upper right corner and slightly away from the pen.

In mathematics, the number 8 is an even number, which has four factors, including 1, 2, 4, 8. It is a palindrome number, that is, from front to back and from back to front are the same number. At the same time, it is also a Vandermonde, number, which means it is equal to the cubic sum of the first three positive integers.

In mathematical operations, 8 can be decomposed into the cube of 2, or it can be expressed as the product of two 2. In addition, 8 is also a symmetrical number, that is, reading from left to right and reading from right to left are the same number.

In geometry, the number 8 can be represented as two quadrangles or an octagon. In addition, it can also be expressed as a quartic plane figure.

In a word, the number 8 has special properties and significance in mathematics. The correct way to write is to write a semicircle first, and then a horizontal line. At the same time, it is also an important number, which often appears and is applied in the fields of mathematics and science.

Skills of correctly writing mathematical numbers;

1. According to the basic principle of writing numbers in a standard way, every number should be written in a standard format. For example, the number "0" should be written as a circle, not as a square or a plane; The number "1" should be a straight line and should not have a tail; The number "2" should have an arc at the bottom, not a complete circle; The top half of the number "3" should be a semicircle, not a complete circle, and so on.

Pay attention to the order of strokes when writing numbers. The correct stroke order should be from top to bottom, from left to right, first horizontal and then vertical, first left and then down, first outside and then inside, first inside and then outside. In the process of writing, we should pay attention to avoid incomplete, cross and repeated strokes, and keep the handwriting neat, standardized and easy to read.

3. For multiple digits, you need to pay attention to the separator between each digit. Generally, they are separated by commas or spaces, such as "123,456,789" or "1234567890". At the same time, you need to be careful not to have spaces or punctuation marks in the middle of the numbers.

4. Pay attention to the position of decimal point for numbers expressed by scientific counting method. In general, if you keep a few decimal places, you need to add a few zeros after the original number. For example, "12345× 10 5" is/kloc-0 12345000000. At the same time, it should be noted that the index part should be enclosed in brackets, and the numbers and symbols in brackets should be indicated.

5. Pay attention to the use of symbols when writing mathematical formulas. For example, the multiplication symbol should be written in the front and the division symbol should be written in the back; The addition and subtraction signs should be written in front, and the addition and subtraction signs should be enclosed in brackets; The power symbol should be written in the upper right corner of the base, etc.