2. The road team should build roads. Team a repairs 55 meters every day for 20 days. Team B just finished this middle school by repairing 48 meters every day for 25 days. How long is this road?
3. Xiaohong reads a story book, *** 180 pages. Read 15 pages every day. Read 10 days, 6 pages a day. How many days will it take to finish reading?
A * * * () page has () days of reading every day.
The remaining pages need () days to read () pages every day.
4. To lay a floor tile for a classroom, if you use a floor tile with an area of 60 square meters, you need 80 tiles. How many tiles do you need if you use a square brick with a side length of 5 decimeters?
5. The car carries four people, and the bus carries two people, which is less than five times that of the car. A bus carries more passengers than cars and buses combined 1 1. How many passengers can a bus carry?
6. Make a rectangle with a 32 cm long line. How many ways can you do it if the length and width are whole centimeters? List all the situations and find out what is the largest area and what is the smallest area. What did you find?
7. As shown in the picture, the Zhang family has a rectangular land, where tomatoes and cucumbers are planted respectively.
(1) How many square meters does this land cover?
(2) How many cubic meters is the area of cucumber less than that of tomato? How many different ways can you think of?
Xiaoming's father has two suits and three ties. Today he went to the company for a meeting, wearing a suit and tie. How many collocation methods are there?
9. Four good friends, Xiaohua, Xiaoming, Xiaodong and Xiao Yong, went to the park to play together. Four people stood in a row to take pictures. How many different ways are there to queue up? How many different ways are there to rent a boat for every two people?
10, using the four numbers of 5, 6, 7 and 8, from the largest to the smallest, how many non-repetitive three digits can be formed?