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What is the smallest number in brackets? Grade?One
0。

The minimum number that first-year students will be exposed to is 0. In mathematics education, 0 is considered as the smallest natural number. Not only does it mean that there is no quantity, but it can also be used to compare the sizes of numbers. Through the understanding and application of the concept of zero, first-year students began to be familiar with and master the relationship between numbers and values in a wider range.