Fill in the blanks:
(1) 1 hour 15 minutes = () minutes 120 hours = () days.
48 months = () years 1 week = ()
3500 square centimeters = () square decimeter
24 square meters = () square decimeter
70 square decimeter = () square centimeter
4600 square decimeter = () square meters
7 m 50 cm = () decimeter = () cm
1 m2 7 square decimeter = () square decimeter
(2) 1995 is () year, and there are () days in the whole year; () Every month is 30 days; February in a normal year is () days; February in leap year is () days.
(3) There are () months in a year; In which, () month is 3 1 day per month; () Every month is 30 days; February in a normal year is () days; February in leap year is () days.
(4) A class starts at 40: 00, the first class starts at 7: 30 in the morning, and ends at ().
(5) A shop assistant goes to work at 7: 30 a.m. and leaves work at 3: 20 p.m., and works () hours () minutes that day.
(6) The primary school begins its winter vacation on June 65438+1October 2 1, and the school starts on February 12, with a winter vacation of () days. Xiaohong practiced writing 25 Chinese brushes every day during the winter vacation, and she wrote () Chinese brushes in one stroke.
Secondly, use the 24-hour clock to express the following time.
5 am is () 1 1 am is ()
3 pm is (), 5 pm is ()
9 pm is (), 12 pm is ().
Third, judge the following questions. Mark "√" for the right and "×" for the wrong.
1 Put four squares of 1 square decimeter into a big square, and its circumference is 16 decimeter. …..( )
Two squares with equal perimeters have equal areas. ………( )
Xiaohua goes to bed at 9 o'clock in the evening and gets up at 6 o'clock the next morning. He slept 15 hours. ……( )
A Gregorian calendar year with a multiple of 4.4 is a leap year. For example, 1980, 1984 and 1900 are all leap years. ……( )
5. The perimeters of two rectangles with equal areas must be equal. ( )
4. Fill in the appropriate company name in () of the following question.
The height of the building is 25 () and the area of the blackboard is 4 ().
The area of the desktop is 24 () and the length of a math textbook is 20 ().
The perimeter of the classroom is 28 (), and the playground area is 3000 ().
Fifth, the application problem.
1 A rectangular orchard is 42 meters long and half wide. What is its area?
An earth satellite can fly 1 1 km per second, so how many kilometers can 15 minutes fly?
The school canteen burns 350 kilograms of coal a week. According to this calculation, how many kilograms of coal will be burned in April?
A bus leaves at 7 am, with an average speed of 42 kilometers per hour and a total distance of 336 kilometers. What time does the bus end its journey?
A conference room with a length of10m and a width of 8m is paved with tiles with an area of 4 square decimeters. How many tiles do you need?
6 a rectangular vegetable field, length15m, width 6m, with an average of 26kg eggplant per square meter. How many Jin of eggplant does this vegetable field collect?