(-3, -4, -2,-1) is a negative number.

(0, 1, 2,3,4) is a natural number.

(-4, -3, -2,-1, 0, 1, 2,3,4) is an integer.

1, unit: ten, hundred, thousand/ten thousand. ...

Don't tell me this. You won't.

3, the basic nature of the score is; The numerator and denominator of a fraction are multiplied or divided by the same number (except 0) at the same time, and the size of the fraction remains unchanged.

Basic properties of decimals; Add zero or go to zero after the decimal point, and the size of the small tree remains the same. Compare it yourself.

4. Move one place to the left to reduce 10 times, move one place to the right to expand 10 times, and so on.

5. Is there a book in the first volume or the second volume of the fifth grade?

Do it.

27046=2× 10000+7× 1000+4× 10+6× 1

Is it true that the landlord is a sixth grader? Let's make friends! !

Don't forget to give it to me.