How many numbers are there between two numbers in the first grade mathematics of People's Education Press?

I am speechless for those people, and I still have all the decimals, grade one! Add or subtract numbers up to 20.

There are several numbers between A and B, excluding A and B. Just remember this. There are several numbers between two numbers, excluding the first two numbers and the last two numbers.

For example, how many numbers are there between 1 and 5? 1, 2, 3, 4, 5, ***3 numbers, that is, 2, 3, 4.

How many points can I get for doing the math paper for the college entrance examination in senior one?

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Provide information: learning methods, how to improve learning, some good ways to win the college entrance examination and so on. ...

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