The circumference of a square is 5.6 decimeters. What is the area of a square?
3. The rectangle has an area of 2 1 square decimeter and a length of 5 decimeters. What is its circumference?
4. How many square decimeters of iron sheets do you need to make five 5-decimeter-long uncovered cubic sinks?
The length of the rectangle is 0.54 meters, which is 8 centimeters more than the width. What is the circumference of this rectangle?
6. What is the volume of a cuboid with a base area of 30 square decimeters and a height of 3 meters in cubic decimeters?
7. How many square meters of glass does it take to make a cubic glass fish tank without a cover? The side length is 3 meters.
8. What is the volume and surface area of three cubes with a side length of 8 cm, which are combined into a cuboid?
9. Writing head 1.3m, 0.6m wide and 0.8m high. How much space does 20 such desks need?
10. How much water can a uncovered cuboid iron drum with a width of 2.5 decimeters and a height of 35 centimeters hold?
1 1. This cuboid reservoir has 2 100 cubic meters of water. This reservoir is 50 meters long and 20 meters wide. How deep is it?
12. How many cubic decimeters are the length, width and height of a cuboid?
13. The school sent 7.6 cubic meters of sand and spread the sand in a bunker 5 meters long and 3.8 meters wide. How thick can it be laid?
14. How many cuboid blocks with a length of 8cm, a width of 12cm and a height of 5cm can be sawed into cubes with a length of 2cm?
15. Put two cubes with side length of 1.5 decimeter into a cuboid. What is the volume and surface area of this cuboid?
16.24 rectangular iron chimneys, each 2m long, 4m wide and 3m high. How many square meters of iron do you need?
17. A cuboid bunker is 4m long, 2m wide and 0.5m deep. If the yellow sand weighs 1.4 tons per cubic meter, how many tons does it weigh?
18. The circumference of a rectangle is 55 cm, and the known length is 3.5 cm longer than the width. What is the length and width of this rectangle?
19. The volume of a cuboid oil drum is 18 liter. Its length is 25 cm and its width is 16 cm. How many centimeters is the height of this oil drum?
20. The side length of a cubic tea box is 0.8 meters. If each cubic decimeter can hold 40 grams of tea, how many teas can this tea box hold?
2 1. A cuboid wood, 2.5 meters long, with a cross-sectional area of 1.44 square decimeter. What is the volume of this piece of wood?
22. A cuboid reservoir is 8m long, 5m wide and 3m deep. What is the area of this reservoir? How many cubic meters of water can it hold at most?
23. A commodity box is a cube with a side length of 6 cm. What is the maximum area of a box with a trademark?
24. A rectangular piece of wood with a square bottom is 5 meters long. Cut into 4 sections, increase the surface area of 36 square meters, and find the cuboid volume.
25. A rectangular fish tank, length 1.8m, width 6m and height 8m. How many liters of water can this fish tank hold at most? How many milliliters?
26. The surface area of a cuboid is 156 square decimeter, the bottom area is 30 square decimeter, and the perimeter of the bottom surface is 32 decimeter. What is the volume of this cuboid?
27. The furniture factory ordered 500 square logs, each with a cross-sectional area of 25 square decimeters and a length of 3.8 meters. What is the volume of these logs?
28. The length, width and height of woodcut are 2.8 decimeters, 1.5 decimeters and 2.2 decimeters respectively. How many square meters does it take to make five such drawers?
29. A cuboid oil drum with a bottom area of 18 square decimeter can hold 43.2 kilograms of oil. If each liter of oil weighs 0.8 kg, what is the height of oil in the oil drum?
30. Forge a cubic billet with a length of 8 cm into a rectangular steel plate with a length of 16 cm and a width of 5 cm. How thick is this steel plate? (excluding losses)
3 1. A cuboid becomes a cube when its height increases by 2 cm, and its surface area increases by 48 cm. What is the volume of the original cuboid?
32. There is a swimming pool, which is 25m long,12m wide and1.4m deep. Use 2-meter-long square white tiles at the bottom and around the pool. How many pieces do you need?
33.80 square logs are piled into a cuboid with a length of 2m, a width of 2m and a height of1.5m. What is the average volume of each square log? How many cubic decimeters?
34. A cube fish tank with a length of 12 cm is filled with water. Pour water into a cuboid fish tank with a length of 18 cm and a width of 10 cm. How deep is the water?
35. There is a rectangular steel with a length of 2 meters, a square cross section and a side length of 5 cm. Each cubic decimeter of steel weighs 7.8 kilograms. How much does this square steel weigh?
36. Make an iron box with iron sheet so that its length, width and height are 1.8 decimeter, 1.5 decimeter and 1.2 decimeter respectively. How many square meters does it take to make such an iron box?
37. A rectangular goldfish bowl is 8 centimetres long, 5 centimetres wide and 6 centimetres high. Accidentally, the glass in front was broken. What is the area when the glass is repaired?
38. A 5-meter-long cube fish tank is filled with water. Pour water into a cuboid fish tank with a bottom area of 48 square decimeters and a height of 6 decimeters. How deep is the water in the fish tank?
39. A rectangular glass jar, measured from the inside, is 40 cm long, 25 cm wide and 12 cm deep. After a stone is immersed in water, the water surface rises to 16 cm. Find the volume of the stone?
40. The processing factory will process a batch of TV sets. (No bottom) Each TV is 60 cm long, 50 cm wide and 55 cm high. How many square meters of cloth does it take to make 1000 sets?
4 1. How many square decimeters of iron does it take to make a cuboid iron water tank with a cover whose length, width and height are 8 decimeters, 6 decimeters and 5 decimeters respectively? What is the volume of this box?
42. A rectangular goldfish bowl is 8 centimetres long, 5 centimetres wide and 6 centimetres high. The glass in front of it was accidentally broken. What is the area when the glass is repaired?
43. A classroom is 8 meters long, 6 meters wide and 4 meters high. To paint the roof and four walls of the classroom, excluding doors, windows and blackboards, covering an area of 25.4 square meters. What is a painting area?
44. An 8-meter-long cubic tank can hold 490 liters of water. Pour water into a cuboid water tank with a length of 10 decimeter, a width of 7 decimeters and a height of 8 decimeters. What is the depth of the water tank?
45. There is a fish pond with a length of 18m, a width of 12m and a depth of 3.5m Cement should be coated around the fish pond to prevent water seepage. If 5 kilograms of cement is used per square meter, how many kilograms of cement does a * * need?
46. The rectangular iron sheet is 30 cm long and 25 cm wide. Cut a square with a length of 5cm from each corner to make a box without a lid. How much iron is used in this box? What is its volume?
47. Take a rectangular wooden board with a length of 26dm, cut a square with a bottom length of 3 m at four corners, and make a cuboid container with a volume of 840 cubic decimeter. What is the original width of this board?
48. Our school will paint the classroom, which is 8 meters long, 7 meters wide and 3 meters high. After deducting the area of doors, windows and blackboards, we know that every square meter needs 5 yuan painting fee. How much does it cost to paint a classroom?
49. Xiaoming's father made a cube fish tank with a length of 6dm out of glass. How many square meters of glass does it take to make this fish tank? Xiaoming injected 144L water into the fish tank. What is the height of the water?
50. An auditorium is 20 meters long, 0/5 meters wide and 8 meters high. It is necessary to paint the ceiling and surrounding walls of the auditorium, excluding the area of doors and windows 120 square meters, with an average paint of 0.45 kg per square meter. How many kilograms of pigment does a * * need?
5 1. A rectangular swimming pool is 60m long, 30m wide and 2m deep. How many square meters is this swimming pool? Draw the water level line with red paint along the inner wall of the swimming pool at 1.5 meters. How long is this line? Now the water in the swimming pool just reaches the water level. What's the volume of water in the pool?
52. Mom bought 600 grams of oil, and used 1/3 on the first day and 1/4 on the second day. How much oil is left?
53. Divide 3 tons of rice into 5 parts on average. How many tons per serving? How much is the rice per serving?
54. 12 candy, evenly distributed to three people. How many sweets does everyone have? How many sweets can everyone get?
55. Five apples are divided equally among eight people. How many apples does everyone have? How many apples can everyone get?
56. Master Wang processed 34 parts in 6 hours, and Li Shifu processed 40 parts in 7 hours. Who is more efficient?
57. A book has 185 pages. After reading 95 pages, what percentage of this book have you read? What percentage of unread pages are in this book?
58. There is a piece of wood. Cut off 2/5 meters for the first time and 7/ 10 meters for the second time, leaving 4/ 15 meters. How long is this piece of wood?
59. In the fifth grade, there are 23 boys and 25 girls. What is the percentage of girls to boys? What is the percentage of boys and girls in this class?
There are 49 students in one class, including 24 boys. What percentage of boys are in this class? What percentage of girls are in the class?
6 1. There are 24 students in Class 3, Grade 5 in Shengli Primary School, 12 is not up to standard. What percentage of students in this class have reached the standard?
62. A batch of steel was delivered from the construction site, including 2 tons of round steel, 2/5 tons of square steel and other steel 1/7 tons. How many tons of steel are there?
63. In the last four quarters, Machine Tool Plant has completed the annual tasks of 1/6, 1/5, 4/ 15 and 7/ 10 respectively. How much more than last year's annual plan?
64. The school library has 280 comic books and 140 literature books. How many comic books are there? Which part of a comic book is a literature book?
There are 25 sika deer and 5 giraffes in the zoo. How many times are sika deer more than giraffes? How many giraffes are there more than sika deer?
66. Some fruit trees were planted in the orchard, among which litchi accounted for 12/27, longan accounted for 12/25, and the rest were Myrica rubra. What percentage of Myrica rubra accounts for the total?
67. Lingling is 1 1 years old, and grandpa is 74 years old. No matter how many teenagers there are, Grandpa is four times as old as Lingling.
68. The garment factory has 156 workers, among whom the number of female workers is three times that of male workers. How many male and female workers are there?
69. Children share apples. If everyone is divided into two apples, there are 16 apples. If everyone is divided into five apples, there will be 14 fewer apples. How many children are there?
70. Huafeng Fruit Company delivered 840 kilograms more pears than oranges, and the weight of pears was 1.5 times that of oranges. What are the weights of oranges and pears?
7 1. Mingming went to buy clothes on Sunday and spent 175 yuan to buy a suit. It is known that coats are more expensive than trousers 15 yuan. How much are the coat and trousers?
72. There are three iron wires, one is 24m long, the other is 32m long and the other is16m long. Divide them into small pieces of equal length. How long is each piece?
73. The weight of two packages of relief goods is 154kg, of which the first package is twice as small as the second package, which is 14kg. What is the weight of two packages of relief goods?
74. A water conservancy engineering team built125m every day in the first four days and134m every day in the last three days. How many meters of canals does this engineering team build on average every day?
75. Three cows and six sheep graze 93kg a day, and six cows and five sheep graze 130kg a day. How many Jin of grass does each cow eat more than each sheep every day?
76. The first truck delivered 80 packages of cement, and the second truck delivered 65 packages of cement, which was 1.5 tons less than the first truck. How many tons of cement were transported by two trucks?
77. Students from Class 5, Grade 5 line up to perform, with 12 or 16 people in each row. It is understood that there are less than 50 students in this class. Can you figure out how many students there are in this class?
78. The warehouse stores rice and flour. It is known that the stored flour is 4500 kilograms more than rice, and the stored flour is three times more than rice and 700 kilograms more. How many kilograms of rice and flour are stored in the warehouse?
79. Xinhua Bookstore delivered 5,250 literature and science books to the countryside. There are 25 packages of literature books and 80 packages of science and technology books, the number of which is equal for each Bao Shu. How many books are there in each package? How many books are there in science and technology and literature and art respectively?
80. A fruit shop has two baskets of apples with the same price. The first basket weighs 45 kg, the second basket weighs 39 kg, and the second basket sells less than the first basket 15 yuan. How much are these two baskets of apples worth? How much are two baskets of apples worth?
8 1. A grain store sells 50 bags of flour in the morning and 30 bags of flour in the afternoon, each with the same weight, and sells 1600 kg more flour in the morning than in the afternoon. How many kilograms does each bag of flour weigh? How many kilograms of flour do you sell in the morning and afternoon?
82. A two-digit number, the number of ten digits and the number of one digit are exchanged, and the two digits obtained are still prime numbers. Write two such two-digit numbers.
There are 40 students in Class 83.5 (2) * *, and girls account for two thirds of the boys. How many girls are there?
84. There are 200 apple trees in an orchard, 80 of which are more than 4/5 of pear trees. How many pear trees are there?
85. Road construction has covered 60% of the total length and 10 km, with 40 km left. How many kilometers is this road?
86. There are 2450 literary books in a bookstore, and 3/7 literary books are exactly equal to 2/3 story books. How many story books are there?
87. A cartoon toy car used to cost less in 20 yuan 1/5. How much is it now?
88. Liang Xiao saved 18 yuan, Xiaohua saved six fifths of Xiao Liang and Xiaohua saved two thirds of Xiaohua. How much did Xiao Xin save?
89. A machine factory originally planned to produce 2,400 machine tools, but actually more than 600. What percentage of the original plan was actually completed?
90. Xiao Fang and Xiaoli jump rope. Xiao Fang jumps 30 times less than Xiaoli, and Xiao Fang jumps 5/7 of Xiaoli's. How many times did they jump?
9 1. Mother bought Xiaohong a suit. The price of a pair of trousers is 60 yuan, which is 2/3 of that of a coat. How much is this coat?
92. The price of a table is 90 yuan, and the price of a chair is lower than that of a table 1/6. How much is a chair?
93. "Star" Children's Wear Factory produced 1.26 sets of children's wear in April, exceeding the original plan of 1/5. How many sets of clothes were originally planned to be produced?
94. Xiaoming's stamp collection is three-fifths that of Liang Xiao. Xiaoming's stamp collection is 60 pounds less than that of Liang Xiao. How many stamps did Xiaoming and Liang Xiao collect respectively?
95. There are 23 boys and 22 girls in Class Five (1), and the class size accounts for 3/ 10 of the total number of students in Grade Five. How many people are there in the fifth grade?
96. The distance between A and B is 400 kilometers. Car A traveled from A to B 1/5. How many kilometers does it take?
97. There are 104 students in the second grade of Oriental Primary School, which is 8/9 of the fourth grade, and the fourth grade is 3/ 13 of the whole school. How many students are there in the school?
98. Every apple tree benefited from 250 yuan last year. Through scientific pruning this year, the income per tree increased by 16%. How much did each tree harvest this year?
99. There are three kinds of flowers in the big flower bed of a school, including 60 pots of Chinese rose flowers, accounting for 20% of these three kinds of flowers, and peony flowers are 9/25 less than the total number of these three kinds of flowers. How many pots of peony flowers are there?
100. A workshop can produce 120 type A parts, 100 type B parts or 200 type C parts every day. Three, two and 1 A type parts can be made into a set. Now it is required to produce the most complete set of products within 30 days. How many days does it take to produce three parts, A, B and C?