If there are five Saturdays and Sundays in June, what day is June 1st?

Analysis: Because there are five Saturdays and Sundays, according to the general algorithm, June should have 7× 5 = 35 days. In fact, there can't be 35 days in June, only 30 days.

So we can only push it back: the 30th is Sunday, and the 29th is Saturday. Then except these two days, it happens to be four weeks and 28 days, but these four weeks end on Friday and start on Saturday, so June 1 is Saturday, so June 1 is Saturday.

The problem solving process is as follows:

30÷7=4…2

30-7×4=2

There are 7 days in a week, and 4 Mondays * * * are 28 days, that is, there are 4 cycles from Monday to Sunday in a month, so Saturday and Sunday will appear 4 times, and June 1 day * * * is 30 days, so the remaining 2 days must be Saturday and Sunday, so as to meet the conditions of 5 Saturdays and Sundays.

Extended data:

Operational nature of the Division:

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.