Simply read numbers and write Chinese characters, such as 105, read: 105, and read operations, such as multiplication, division or ratio, and write numbers, such as reading 2: 3 and reading 2: 3 in grade six. 2×7= 14 is a multiplication operation, so reading 2 times 7 equals 14. It emphasizes reading operation.

Reading: Write in Chinese characters by reading.

Writing: Write numbers in Arabic numerals.

Can be calculated by division. (blackboard writing: division) can be expressed as follows: 12÷4=3 (the formula is different with different arrangements. The formula is this: 12 divided by 4 equals 3. ⊙ is a division symbol.

The history of mathematical multiplication;

The earliest and most detailed rules about decimal multiplication can be found in Sun Tzu's calculations around 400 AD. The multiplication formula of Sun Tzu's Art of War was introduced by Hua Lazi in the 9th century, and it became popular in Arab countries. It was translated into Latin in the13rd century and became popular in the west. ?

Indian lattice multiplication was introduced into China in the Tang Dynasty and Arabia in the early 9th century, but it failed to catch on. The British government put forward the idea of reforming basic mathematics education. They require British children to master the multiplication table 12 times 12 before they graduate from primary school. Cameron's "embarrassing problem" also occurred at the press conference of this policy.