1. A factory saved 720 tons of water in September (30 days), saving an average of () tons of water every day.

2. According to the 24-hour system, 5: 20 pm is (), and afternoon 12 is ().

3. There are () days in June, February and March of leap year, and () days in June, February and March of leap year.

4.36 months = () years () =240 seconds 8 hours = () minutes.

Second, the column vertical calculation.

120×58 5600÷ 14

Third, off-type calculation.

42×(365-287) 3 108÷42× 15

Fourth, column calculation.

What is 78 104? 34 divided by 1458, what is the quotient and remainder?

Fifth, the judge. (Mark "√" correctly and "×" incorrectly)

1, given the number of products produced by a worker every day and the number of working days, it is a matter of work efficiency to find out how many products the worker produces this day. ……………………( )

2. "The distance from Xiaohong's home to Children's Palace is1250m. Xiaohong walked from home to the Children's Palace for 20 minutes. How many meters does she walk per minute? " It's a topic of distance. ……………………( )

Sixth, the application problem.

1. A train leaves A at 9 o'clock and arrives at B on 19. The train travels 75 kilometers per hour. How many kilometers is it between A and B?

2. A road is 7500 meters long, and the road repairman has repaired it for 12 days, leaving 2700 meters. How many meters are repaired on average every day?

3. Bikes run 18km per hour, motorcycles run 27km faster than bicycles, and motorcycles run 13km per hour.

There are 380 red goldfish, and the number of flower goldfish is three times that of red goldfish. How many more than red goldfish?

The school bought 35 boxes of exercise books, 30 in each box and 42 in each class. Can be divided into several grades?