Draw a banner in the middle of the pictorial, with a suitable background color. Write a title on the painted banner: "multiplication formula" Draw a border according to the size of the pictorial to make it more beautiful.

Draw a border below and prepare to write the related content of "multiplication formula" Write the related propaganda words about the topic "multiplication formula" in the drawn border. Finally, draw a "multiplication table" in the lower right corner, and the handwritten newspaper will be drawn, which is simple and beautiful.

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The multiplication formula is the basic calculation rule of multiplication, division and square root in ancient China. Used for more than two thousand years, the multiplication table is also the basic skill of elementary school arithmetic.

The ancient multiplication formula is from top to bottom, from "998 1" to "one to one", which is contrary to the order of use. Therefore, the ancients used the word "99" at the beginning of the multiplication formula as the name of this formula, also known as "99 table", "99 song" and "99 multiplication table".

During the Spring and Autumn Period and the Warring States Period, not only the decimal system was invented, but also the nine-nine watch was invented. Later, the East was introduced to Korea and Japan, and then spread to India and Persia in the west through the Silk Road, which became popular all over the world. Decimal system and nine tables are important contributions of ancient China to world culture. Multiplication in Greece and other countries is rarely used internationally.

Knowledge expansion:

The ancient Mayans used the decimal system, which is the closest to the decimal system commonly used in the modern world. A multiplication table of 19x 19 has 190, which is more than three times larger than the 45 items in the Jiujiu table, but much simpler than the Babylonian method. But archaeologists haven't found any Mayan multiplication tables yet.

Multiplication by multiplication table is not the inevitable result of carry system. Babylon had the carry system, but they didn't invent or use the multiplication table in the form of 99 tables, but invented the square table method to calculate the products. The Mayans' mathematics was the most advanced in ancient western civilization. They used the decimal system, but they didn't invent the multiplication table. It can be seen that there has been a lot of progress from the carry system to the multiplication table.