The law of quotient invariance in the fourth grade: in the division formula, the dividend and divisor are multiplied (divided) by the same number (except 0) at the same time, and the quotient remains unchanged.

In the division formula, the divisor is constant, the dividend is multiplied (divided) by a number (except 0), and the quotient is also multiplied (divided) by the same number; The dividend is constant, the divisor is multiplied (divided) by a number (except 0), and the quotient is divided (multiplied) by the same number; Divider and divisor are multiplied (divided) by the same number at the same time (except 0), and the quotient remains unchanged.

Partial correlation formula:

1, dividend = quotient

2. Dividend = divisor

3, divisor × quotient = dividend

4. Divider = (dividend-remainder) quotient

5, quotient = (dividend-remainder) ÷ divisor

Operational properties of division

1, the dividend is enlarged (reduced) by n times, and the quotient is correspondingly enlarged (reduced) by n times under the condition that the divisor is unchanged.

2. The divisor is expanded (reduced) by n times, while the dividend is unchanged, and the quotient is correspondingly reduced (expanded) by n times.

3. Dividing the dividend by two divisors is equal to dividing by the product of these two divisors.