Second grade division problem
The quotient invariance of the law of division operation: the dividend and divisor expand or shrink by the same multiple at the same time, and the quotient remains unchanged except 0.
Removing two numbers in succession is equal to removing the product of these two numbers. a÷b÷c=a÷(b×c)
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.
The divisor is expanded (reduced) by n times, while the dividend is unchanged, and the quotient is correspondingly reduced (expanded) by n times.
Dividing by two divisors in succession is equal to dividing by the product of these two divisors. Sometimes simple operations can be performed according to the nature of the division. For example, 300÷25÷4=300÷(25×4) divided by a number is equal to the reciprocal of this number.
The operation formula of division is dividend-divisor = quotient.
Dividend = divisor
Quotient divisor = dividend
There is another situation:
Dividend Divider = quotient ... remainder (not greater than divisor)
Divider × quotient+remainder = dividend