In the third grade of primary school mathematics, the lower two digits are divided by two or three digits.
Two digits divided by three digits, that is, three digits divided by two digits, the quotient may be two digits (for example, 980÷20=49) or one digit (for example, 100÷50=2).
Three digits divided by two digits. When the first two digits of the dividend are greater than the divisor, the quotient is two digits, for example, 720÷36=20. When the first two digits of the dividend are less than the divisor, the quotient is a single digit, for example, 260÷52=5.
Law of division: the dividend is enlarged (reduced) by n times, and the quotient is correspondingly enlarged (reduced) by n times when 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.
Related formula of division: dividend ÷ divisor = quotient dividend ÷ quotient = divisor × quotient = dividend divisor = (dividend-remainder) ÷ quotient = (dividend-remainder) ÷ divisor. Two digits divided by three digits, that is, three digits divided by two digits, the quotient may be two digits (for example, 980÷20=49) or one digit (for example, 100÷50=2).
Three digits divided by two digits. When the first two digits of the dividend are greater than the divisor, the quotient is two digits, for example, 720÷36=20. When the first two digits of the dividend are less than the divisor, the quotient is a single digit, for example, 260÷52=5.