Materials and tools: white paper, pencil, ruler, scissors, eraser.

1, prepare materials.

2. Next, the pencil draws a figure on the white paper and a trapezoid figure along the ruler.

3. The pencil is on the white paper, and draw a vertical line along the ruler.

4. Then draw a horizontal line along the ruler with a pencil on the white paper in the same way. This horizontal line needs to be aligned, so that the table will be neat.

5. Then cut off all the parts except the trapezoid with scissors.

6. Finally, write it in the table in pencil according to the order of the multiplication table, so that you can make the multiplication formula that you carry with you.

Ancient 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.

In China, the earliest multiplication formula table is one of more than 30,000 Qin bamboo slips unearthed in Liye ancient city, western Hunan in 2002, which records the multiplication formula in detail. Different from the multiplication formula table, the formula table on Qin bamboo slips does not start from "one to one", but from "998 1" to "two and a half to one".