Three divided by eight divided by a joke.

Dividends decrease by 10 times, and quotients also decrease by 10 times. Because the quotient obtained from the result is 72 times smaller than the correct quotient, it is 9 times less.

So 72÷9=8

So the correct quotient is 8x 10=80.

The correct result is 80.

analyse

The zero at the end of the dividend is omitted, and the quotient obtained is 72 times smaller than the correct quotient. According to the meaning of division and the changing law of quotient, we can know that the dividend with constant divisor is reduced by 10 times, and the quotient is also reduced by 10 times. As a result, the quotient obtained is 72 times less and 9 times less than the correct quotient. So 72÷9=8, so the correct quotient is 8x 10=80.

Extended data:

Calculation of integer division:

1. Start with the high order of the dividend, first look at how many digits there are in the dividend, and then try to divide the dividend by the first few digits. If it is less than the divisor, try dividing it by one digit.

2. Write the quotient except the dividend on the dividend.

3. The remainder after each division operation must be less than the divisor.