In recent years, several sets of newly published mathematics textbooks have arranged "100 tables" in the cognitive unit of grade one. The teaching focus of this content is mainly to make students familiar with the reading and writing methods of numbers within 100, master the composition and size of numbers within 100, further establish the digital consciousness, and lay the foundation for later learning addition and subtraction within 100.

Extended data

100-meter law:

1, each line has 10 numbers, and there are 10 lines.

2. The number on the right of two adjacent numbers in a row is larger than the number on the left 1.

3. The number below two adjacent numbers in the column is greater than the number above 10.

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