2: A ÷ B is the divisor, A is the dividend, and the dividend divided by the divisor equals the quotient.

3: equal to a/b, that is, a of B.

4: a divided by B equals a/b, that is, A in B.

5: A divided by B equals b/a, that is, B of A. ..

6: A Except for B and A Except for B, mathematically, only divisor is used to divide the dividend. The reason is the same as the second one.

7: There are rational numbers, irrational numbers, natural numbers, positive reciprocal antonyms, real numbers, imaginary numbers, negative common multiples, constant derivatives, partial derivatives, decimal logarithms, exponential coefficients and so on.