125×48 125×(8×5)×7 999×99+99 8000÷ 16

75×99+75 88× 125 4200÷25÷4

1999+999×999 156×28- 156× 15+87× 156

(40+4)×25 25×99 96× 10 1-96

99×59+59 6 1×39+39×39 55×25+75× 15

Second, the problem-solving question bank.

1, Xiaojun's father bought a computer and a repeater. Repeater price in 280 yuan, computer price 20 times cheaper than repeater, 20 yuan. How much did it cost to buy a computer and a repeater?

2. Uncle Wang raised 96 yellow cattle, 24 fewer than buffalo, and the number of cattle raised was three times that of yellow cattle and buffalo. How many cows are there in Uncle Wang's family?

Li Lin's family is going to lay a floor tile for a room 8 meters long and 6 meters wide. If you choose a square brick with a side length of 4 meters, how many pieces do you need at least?

There is a rectangular flower bed 8 meters long and 5 meters wide, surrounded by a lawn 3 meters wide. Find out the area of this lawn.

5. A theater can seat 300 more people than before, whether it adds 10 seats or 15 seats in each row. How many seats are there in this theater?

6. Li Shifu processed 126 parts in 3 hours. At this rate. Li Shifu will deal with it for another seven hours. How many parts can a * * * process?

7. A square vegetable field, with one side extending 3 meters and the other side extending 7 meters, has a rectangular area larger than the original square11square meter. So what is the original square area? Draw your own pictures and sort them out. )

8. The price of a PHS is one in 650 yuan, and the price of a mobile phone is more than three times. How much is it more than PHS to buy such a mobile phone for 20 yuan?

9. Xiaohua needs five minutes to go to school by bike from home, and the same speed is needed to go to the library by bike from school.

school library

450 million square meters

(1) Use a formula containing letters to express the time he spent from home to the library.

(2) When y =540, how long does it take him to get from home to the library?

10. A farmland with a length of 30 meters and a width of 20 meters needs to be reduced due to railway construction in a certain place. It is required to reduce the length by 8 meters and the width by 4 meters. How many square meters has the area of this farmland decreased? Draw the reduced part on the picture before you answer.

1 1. Fang originally had a square wheat field with a side length of 20 meters. After re-dividing the land, the side length of this square wheat field increased by 5 meters. How many square meters has the square wheat field increased?

20 meters

12, the length of a rectangle is increased by 8 meters and the area is increased by 24 square meters; If the width of this rectangle is increased by 2 meters, the area will increase by 14 square meter. How many square meters was the original rectangle? Draw a picture on the picture before you answer.

13, Xiao Wang borrowed a story book, 120 pages, and read 30 pages in the first three days. If the loan period is 8 days, how many pages will she read on average every day from the fourth day?

14, Red Sun Plaza used to have a 40-meter-long rectangular garden, which was later expanded by 20 meters and increased by 400 square meters. How many square meters does this garden cover now?

15, Hongshan cement plant 1999-2004 cement output is as follows:

Year1999 2000 2006 5438+0 2002 2003 2004

Output (ten thousand tons)110135152180205235

Please make a broken line statistical chart according to the above table.

Hongshan Cement Plant 1999-2004 Statistics of Cement Output

time

250

200

150

100

50

1999 2000 200 1 2002 2003 2004

What information can you get from the table? (Write at least 2 articles)

Please predict that the cement output in 2005 will be about () ten thousand tons.

16、

17, buy 1 basketball to 54 yuan, 1 football ratio 1 basketball is expensive 16 yuan. Miss Li's money can just buy 10 basketballs. If you use this money to buy football, how many can you buy at most?

18. As we all know, the circumference of a square is 24 meters. If the length of each side is increased by 4 meters. How many square meters has its area increased?

(Draw and analyze first, then answer)

19. The parking lot of a scenic spot used to be a rectangle, 80 meters long and 30 meters wide. Due to the increase in the number of parking lots, the parking lot is now expanded, with a length of10m and a width of 5m. How many square meters has this parking lot increased now?

20. There are 1 cm, 4 cm and 6 cm sticks, which are arranged into an equilateral triangle and two isosceles triangles. How can I put it? Please list all the situations.

Reference answer:

equilateral triangle

The three sides are1cm1cm1cm4cm4cm6cm.

The three sides are 4cm4cm6cm6cm4cm.

The length of three sides is 6 cm 6cm 6cm 6 cm 6cm 1cm.

The length of the three sides is 4cm4c 1cm.

Zhang

Laiyuan lianshan

Original address of Lianshan courseware:/shti/shi/111690.htm.