The number of teachers is known, and it is 18, with 60 teachers in each class and 9 classes. Calculate the number of students with 60×9 equal to 540. Add 540 and 18, and the number of people traveling will be 558.
Column type:
60×9+ 18
=540+ 18
= 558 (person)
After counting the numbers, let's look at the problem. The first question is whether there are enough seats, and then we will ask the number of seats. It is known that each car has 45 seats, and * * * rented 12 cars, so 45× 12 was used to get 540 seats.
Column type:
45× 12 = 540 (piece)
The question is whether there are enough seats, so we compare the two and find that:
558>540
That is to say, there are not enough seats (interjecting: if there are enough seats, there will be no subsequent problems).
The second question is to tell you a strategy, that is, to answer: how can we get this 18 person to come with us? This question is simple. Just rent a smaller car (18 people rent 45 buses, which is a bit exaggerated).
postscript
If you want to write the format of the application problem, you should add a subtitle (1)(2) and so on. The correct format is as follows:
(1) Total population: 60× 9+ 18.
=540+ 18
= 558 (person)
(2) Total seating capacity: 45× 12 = 540.
(3)558>540
Subtitles and notes will make it easier to correct teachers. Some teachers also ask that you can't write numbers directly in off-line calculation, which is necessary for homework and exams.