18.9 liters.
Large water buckets are usually 18.9 liters and are placed above the water dispenser. At present, almost all bottled water in the domestic market is packaged in 5-gallon bottles, which corresponds to the common 3-gallon bottled water. The reason for the question of how many liters of water are in large and small barrels. This is because 5 gallons of water Compared to 3 gallons of water, the unit price of water is cheaper.
1. Subtract 24 from a number, add 15, then multiply by 8 to get 432. Find that number.
2. Add 3 to a number, multiply it by 3, subtract 3 and finally divide it by 3. The result is always 3. Find that number.
3. 4 times a number plus 6 minus 10, then multiply by 2 to get 88. Find this number.
4. Reduce a number by 3 times, then reduce it by 2 times to get 80. Find that number.
Exercise 2:
1. A,B and C each have comics. Afterwards, A gives 3 comics to B, and B gives 5 comics to C, then all three. people's books The number of copies is the same. How many more books does B have than C?
2. Xiao Ming, Xiao Hong and Xiao Qiang each have a certain number of glass balls. If Xiao Ming gives 10 to Xiao Hong and Xiao Hong gives 6 to Xiao Qiang, all three people will have the same. number. How many more does Xiaohong have than Xiaoqiang?
3. The three groups A, B and C each have books. If group A lends 13 books to group B and group B lends 6 books to group C, then the books of the three groups are as follows. the number is the same. Which group, Group B or Group C, has more books? How many additional copies?
4. Three children A, B and C each have a certain number of calendar cards. If A gives 13 cards to B, B gives 23 cards to C and C gives 3 cards to A, then eachof them 30 Zhang asked how many calendar cards each of the three people had?
Exercise 3:
1. Grandma Li sells eggs She sells 10 eggs more than half of the total in the morning and sells 10 eggs more than the remaining half l 'afternoon. Finally, there are still 10 eggs left. 65 eggs were not sold. How many eggs did Grandma Li have?
2. There are a number of plums in the bamboo basket. Give half and a plum to the first person, then bring the remaining half and two plums to the second person, leaving 6 plums. How many plums were in the bamboo basket?
3. Uncle Wang had a salary of several yuan, so he took half of his salary, more than 10 yuan, and deposited it in the bank. He also spent the remaining half and more than 5 yuan. Buy oil, salt, sauce and vinegar, and the remaining 80 yuan was deposited in the bank. What is the salary ofUncle Wang?
4. Mom bought oranges. Xiao Ming ate half of it on the first day, 2 oranges more, and ate the remaining half on the second day, 2 oranges less, leaving 5 oranges. How many oranges did mom buy?
Exercise 4:
1. Xiao Hong, Xiao Ming and Xiao Ning all like to draw. If Xiao Hong gives 11 pictures to Xiao Ming, Xiao Ming gives 20 pictures to Xiao Ning. , and Xiao Ning gives Xiao Ning 20 frames. If there are 5 red images, then all three have the same number of images. The three are known to have a total of 150 images.How many photos did each of the three people have?
2. There are 90 kilograms of apples in three baskets. If 15 kilograms are taken out of basket A and put into basket B, 20 kilograms are taken out of basket B and put into basket C, and 17 kilograms. are taken out of basket C and put into basket A. At this time, the three baskets of apples are also heavy. How many kilograms of pWhat did each of the three baskets A, B and C originally contain?
3. There are 156 students in the three third grade classes If 5 students are transferred from class 3 (1) to class 3 (2), and 8 students are transferred from class 3 (2). ) to class 3 (3), then transfer 4 people from class three (3) to class three (1). At this point, the number of people in each class is exactly equal. How many people were there in each of the three classes?
4. Xiao Lin, Xiao Fang, Xiao Jun and Xiao Min all like to read. If Xiao Lin gives Xiao Fang 10 books, Xiao Fang gives Xiao Jun 12 books, and Xiao Jun gives 20 books. to Xiao Min, Xiao Min gives Xiao Lin an extra 14 books, and the four people have the same number of books. They are known to have a total of 112 pounds. How many books did the four of them originally own?
Exercise 5:
1. Two people carried 60 books together. Xiao Ming took somefirst. Xiao Hong saw that he had taken too much and took half away. No Yes, Xiao Hong gave him 10 pounds. At that time, Xiao Ming was 4 pounds heavier than Xiao Hong. Ask Xiao Ming how many copies he took initially?
2. The two brothers competed to collect 26 bricks. The younger brother rushed to pack a few. The older brother saw that the younger brother had collected too many bricks, so he took half of them. refused, so the older brother gave 5 bricks to the younger brother. At that time, there are so many people. I asked my brother how many pieces he planned to choose initially.
3. There are 28 sparrows in the two trees. Half of them flew from the first tree to the second tree, and 3 sparrows flew from the second tree to the first tree. the second tree has 6 more birds than the first tree. How many sparrows were there in the first tree?
4. Twoof water, A and B, each weigh several kilograms. If the same amount of water as in bucket B is poured from bucket A into bucket B, the same amount of water as in bucket. A is poured from bucket B. Water is poured into bucket A. At this time, the two buckets of water weigh 24 kilograms. Ask how many kilograms each of the two buckets of water originally weighed?
1. There are 30 chickens and rabbits in total, with a total of 84 legs. How many chickens and rabbits are there?
2. There are 100 chickens and rabbits in total, with a total of 280 legs. How many chickens and rabbits are there?
3. There are 50 chickens and rabbits in total. The rabbit's feet are 40 fewer than the chicken's feet. How many chickens and rabbits are there?
4. There are 45 chickens and rabbits in total. Chickens are 60 feet taller than rabbits. How many chickens and rabbits are there each?
Exercise 2:
1. Chickens and rabbits live in the same cage.There are 30 more chickens than rabbits, with a total of 168 legs. How many chickens and rabbits are there?
2. Chickens and rabbits live in the same cage. There are 25 more chickens than rabbits, and a total of 170 legs. How many chickens and rabbits are there?
3. Buy two types of theater tickets, A and B. Type A tickets cost 4 yuan each, and type B tickets cost 3 yuan each. Type B tickets bought 9 more tickets than type A tickets. They were used for a total of 97 yuan, how many tickets of each type did you buy?
4. There are 48 chicken and rabbit legs if the chicken is. If the number of chickens and rabbits is reversed, there will be a total of 42 chickens and rabbits. How many chickens and rabbits are there?
Exercise 3:
1. A certain school organized a mathematics competition. Each correct question received 9 points, and each incorrect question was deducted 3points. There were 12 questions in total. , and Xiao Ming gained 84 points, how many questions did he get wrong?
2. A primary school organized an English competition. Each correct answer was worth 10 points, and each incorrect answer was deducted 2 points. There were 15 questions in total, Xiao Ming scored 102 points. was he right?
3. A company transports 400 boxes of shirts and stipulates that the freight per box is 30 yuan. If a box is lost, not only will no freight be paid, but 100 yuan compensation will be required. The freight payment after shipment is 8,880 yuan. Question: How many boxes were lost in this shipment?
4. A certain workshop produces a batch of 250 clothes, and you can get 25 yuan for each piece produced. If any part does not meet the requirements, 20 yuan will be deducted and the cost. after production will be 5,350 yuan. How many items are unqualified?
Exercisece 4:
1. The number of pieces of fruit candies is three times that of chocolate candies if Xiao Ming eats 2 pieces of fruit candies and 1 piece of chocolate candies. day, after a few days, the number of fruit candies will be 7. There are still 7 candies left, and the chocolate candies have just finished. How many pieces of fruit candy are there?
2. Xiao Ming's family has apples and pears. The number of apples is three times that of pears. Dad and Xiao Ming each eat an apple every day, and Mom eats a pear every day. A few days later, there are 9 apples left, and all the pears are eaten. How many apples are there?
3. There are red balloons and yellow balloons in a certain store. The number of red balloons is 4 times greater than that of yellow balloons. 2 red balloons and 1 yellow balloon are sold every day. , the red balloons remain 12 pieces, theyellow balloons have just been used up. How many red balloons are there?
4. Class 4 (3) has several boxes of colored chalk and white chalk. The number of boxes of white chalk is 7 times that of colored chalk. She uses 2 boxes of white chalk and 1 box of white chalk. of colored chalk every day. When all the chalk is used up, 10 boxes of white chalk remain. How many boxes of white chalk are there?
Exercise 5:
1. The school purchased 8 desks and 6 chairs, at a total cost of 1,650 yuan. The price of each desk is double that of each chair. How much does each desk and chair cost?
2. It costs 252 yuan to buy 4 desks and 9 chairs. The price of a table and 3 chairs is exactly the same. What is the unit price of the table and chairs?
3. The school bought 4 basketballs and 5 volleyballs for a total of 185 yuan. We know that a footballsket costs 8 yuan more than a volleyball, so how much are the unit prices of basketballs and volleyballs. ?
4. Xiao Ming bought 2 table tennis balls and 4 rubber balls for a total of 52 yuan. The price of 6 table tennis balls is equivalent to the price of one rubber ball. What is the unit price of table tennis balls and rubber balls? 1. A project will take 40 days to be completed by A alone, 30 days for B to complete it alone, 24 days for C to complete it alone. After B and C cooperate for 3 days, B and C leave for a few days for professional reasons. The number of days B left for was 3 days more than C. As a result, it took a total of 14 days to complete. . Ask B and C how many days each will be gone?
2. A store sells products at 10% of the listed price and can make a profit of 20%. If the purchase price of the products is 21 yuan per piece, what is the listed price of each piece. ?
1. A rectangular sandbox is 4 meters long, 2 meters wide and 0.5 meters deep. If each cubic meter of yellow sand weighs 1.4 tons, how many tons does yellow sand weigh?
2. A rectangular iron water tank is 18 decimeters long and 10 decimeters wide. It is known that this water tank can hold up to 1620 liters of water.
3. A rectangular plastic box containing medicine is 0.6 meters long, 0.25 meters wide and 0.5 meters deep. If this entire box of medicine is placed in a small bottle that can hold 400 ml each, how much. can potion bottles fit in this box?
4. A cubic steel billet with an edge length of 6 decimeters is forged into a square steel cuboid with a cross section of 3 centimeters per side. Combien of meters measures steel?
5. A rectangular oil barrel has a bottom surface area of 18 square decimeters and can hold 43.2 kilograms of oil. If each liter of oil weighs 0.8 kilograms, how high is the barrel of oil in decimeters. ?
6. In a glass jar 25 cm long and 20 cm wide there is a cubic iron block with an edge length of 10 cm. At this time, the water depth is 15 cm. is removed from the pot Remove it, how deep is the water in the tank?
7. A rectangular parallelepiped fuel tank has a square bottom and a side length of 6 decimeters measured from the inside. There are 144 liters of oil inside. It is known that the depth of the oil inside is half the depth of the fuel tank. How many decimeters is the depth of the fuel tank?
8. In total, 1,200 parquet floors measuring 40 cm long, 20 cm wide and 2 cm thickare placed in a room. How many square meters does this room take up in total? How many cubic meters of wood do you need to pave this room?
9. A rectangular steel section is 1.6 meters long and has a square section with a side length of 4 centimeters. Each cubic centimeter weighs only 7.8 grams. How much does this square steel weigh?
10. Use iron sheets to make a cuboid oil barrel without a lid. The length and width are 4 decimeters and the height is 6 decimeters. How many square decimeters of iron sheet are used? Put gasoline in a barrel. Each liter of oil weighs 0.82 kilograms. How many kilograms of gasoline can this barrel of oil hold?
11. A cubic steel billet with an edge length of 0.6 meters is forged into a rectangular steel material with a cross section of 0.09 square meters. What is the length of forged steel material? (Useuse equations to answer)
12. A rectangular glass tank is 40 cm long and 25 cm wide when measured from the inside. The water depth in the tank is 12 cm. After a stone is immersed in water, the water level rises up to 16 cm. Find the volume of the stone.
13. To make a rectangular iron fireplace with 12 sections, each section measures 2 meters long, 4 decimeters wide and 3 decimeters high. How many square meters of iron should be used at least?
14. The floor of Xiao Min's room is rectangular in shape. It measures 5 meters long, 3 meters wide and has a 2 cm thick wooden floor. How many cubic meters of wood do you need?
15. A coal truck is 2.5 meters long and 1.8 meters wide inside. The height of the loaded coal is 0.6 meters. The average weight of coal per cubic meter is 1.5 tonnes. is loaded in this truck?
16. A serectangular iron without lid. The bottom is a square with a side length of 4 decimeters and a height of 1 meter. How much sheet metal does it take to make a bucket like this? How many liters of water can this bucket hold?
17. The stadium is paved with 37.5 cubic meters of ash on a straight track 100 meters long and 7.5 meters wide. How thick can ashes be spread?
18. A rectangular children's pool is 40 meters long, 14 meters wide and 1.2 meters deep. How many square tiles with an area of 16 square decimeters should be glued to the four walls and the bottom of the swimming pool?
19. A rectangular container has a lower surface area of 16 square decimeters and a height of 6 decimeters of water. Now put an iron block with a volume of 24 cubic decimeters. What is the water level at this time?
20. Use 2,100 cubes with an edge length of 1cm to form a cuboid. Its height is 10 cm, and its length and width are both greater than its height. What is the circumference of its base?
21. A rectangular iron sheet 32 cm long, cut 4 cm squares from its upper four corners, then bend it and weld it into a rectangular iron box without a cover. We know that the volume of this tin box is 768 cubic centimeters. What is the original surface of this iron sheet?
22. The area of a rectangle is 24 centimeters, and its length and width are both whole centimeters. How many types of such rectangles are there?
23. The number of students in class 5 (1) should not exceed 50. When working in groups, they can be divided into three students per group, four students per group, six students per group and each group according to content pedagogic. 8 people, all kinds of division methods have just ended. This classcan have students ( ) or ( ).
24. A, B and C go to the library to borrow books. A goes every 6 days, B goes every 8 days and C goes every 9 days. 5 The three of them met at the library. When will they all go to the library next?
25. The gardeners planted a tree every 4 meters on both sides of a section of road. In total, 74 trees were planted. You must now plant a tree every 6 meters. So how many trees don't need to be transplanted?
26. Uncle Zhang sold fruit for a day. When he was counting money at night, he found that the pile of bills in his hand consisted of two and five yuan bills. Uncle Zhang divided the pile of money into two piles of equal numbers. The first pile contained the same number of five yuan and two yuan, and the second pile contained the same number of five yuan and two yuan. Do you know how many dollars contains this stack of notes?
27. Fifth grade students at Guangming Primary School are divided into groups of 7, 8 or 6 and line up to do the exercises. They are all divided. How many students are there in fifth grade? grade?
1 Subtract a number and add 24.Take 15 and multiply by 8 to get 432. Find this number.
2. Add 3 to a number, multiply it by 3, subtract 3 and finally divide it by 3. The result is always 3. Find that number.
3. 4 times a number plus 6 minus 10, then multiply by 2 to get 88. Find this number.
4. Reduce a number by 3 times, then reduce it by 2 times to get 80. Find that number.
Exercise 2:
1. A, B and C each have comic strips. Afterwards, A gives 3 comics to B, and B gives 5 comics to C, then all three. people's books The number of copies is the same. How many more books does B have than C?
2. XiaoMing, Xiao Hong and Xiao Qiang each have a certain number of glass balls. If Xiao Ming gives 10 to Xiao Hong and Xiao Hong gives 6 to Xiao Qiang, all three people will have the same. number. How many more does Xiaohong have than Xiaoqiang?
3. The three groups A, B and C each have books. If group A lends 13 books to group B and group B lends 6 books to group C, then the books of the three groups are as follows. the number is the same. Which group, Group B or Group C, has more books? How many additional copies?
4. Three children A, B and C each have a certain number of calendar cards. If A gives 13 cards to B, B gives 23 cards to C, and C gives 3 cards to A, then each of them has 30 Zhang asked how many calendar cards each of the three people had?
Exercise 3:
1. Grandma Li sells eggs She sells 10 eggs more than half of the total in the morning and sells 10 eggs more que the remaining half in the afternoon. Finally, there are still 10 eggs left. 65 eggs were not sold. How many eggs did Grandma Li have?
2. There are a number of plums in the bamboo basket. Give half and a plum to the first person, then bring the remaining half and two plums to the second person, leaving 6 plums. How many plums were in the bamboo basket?
3. Uncle Wang had a salary of several yuan, so he took half of his salary, more than 10 yuan, and deposited it in the bank. He also spent the remaining half and more than 5 yuan. Buy oil, salt, sauce and vinegar, and the remaining 80 yuan was deposited in the bank. What is Uncle Wang's salary?
4. Mom bought oranges. Xiao Ming ate half of it on the first day, 2 oranges more, and ate the remaining half on the second day, 2 oranges less, leaving 5 oranges. How many oranges does mom have?purchased?
Exercise 4:
1. Xiao Hong, Xiao Ming and Xiao Ning all like to draw. If Xiao Hong gives 11 pictures to Xiao Ming, Xiao Ming gives 20 pictures to Xiao Ning. , and Xiao Ning gives Xiao Ning 20 frames. If there are 5 red images, then all three have the same number of images. The three are known to have a total of 150 images. did the three do it?
2. There are 90 kilograms of apples in three baskets. If 15 kilograms are taken out of basket A and put into basket B, 20 kilograms are taken out of basket B and put into basket C, and 17 kilograms. are taken out of basket C and put into basket A. At this time, the three baskets of apples are also heavy. How many kilograms of apples did each of the three baskets A, B and C originally contain?
3. There are 156 students in the three third grade classes If 5 students are transferred from class 3 (1) to class 3 (2), and 8 students are transferred from class 3 (2). ) to class 3 (3)), then trtransfer 4 people from class three (3) to class three (1). At this point, the number of people in each class is exactly equal. How many people were there in each of the three classes?
4. Xiao Lin, Xiao Fang, Xiao Jun and Xiao Min all like to read. If Xiao Lin gives Xiao Fang 10 books, Xiao Fang gives Xiao Jun 12 books, and Xiao Jun gives 20 books. to Xiao Min, Xiao Min gives Xiao Lin an extra 14 books, and the four people have the same number of books. They are known to have a total of 112 pounds. How many books did the four of them originally own?
Exercise 5:
1. Two people carried 60 books together. Xiao Ming took some first. Xiao Hong saw that he had taken too much and took half away. No Yes, Xiao Hong gave him 10 pounds. At that time, Xiao Ming was 4 pounds heavier than Xiao Hong. Ask Xiao Ming how many copies he took initially?
2. The two brothers affronted to collect 26 bricks. The younger brother rushed to pack a few. The older brother saw that the younger brother had collected too many bricks, so he took half of them. refused, so the older brother gave 5 bricks to the younger brother. At that time, there are so many people. I asked my brother how many pieces he planned to choose initially.
3. There are 28 sparrows in the two trees. Half of them flew from the first tree to the second tree, and 3 sparrows flew from the second tree to the first tree. the second tree has 6 more birds than the first tree. How many sparrows were there in the first tree?
4. Two buckets of water, A and B, each weigh several kilograms. If the same amount of water as in bucket B is poured from bucket A into bucket B, the same amount of water as in bucket. A is poured from bucket B. Water is poured into bucket A. At this time, both buckets of water weigh 24 kilograms. Ask how many kilograms each of the two buckets of water originally weighed?
1. There are 30 chickens and rabbits in total, with a total of 84 legs. How many chickens and rabbits are there?
2. There are 100 chickens and rabbits in total, with a total of 280 legs. How many chickens and rabbits are there?
3. There are 50 chickens and rabbits in total. The rabbit's feet are 40 fewer than the chicken's feet. How many chickens and rabbits are there?
4. There are 45 chickens and rabbits in total. Chickens are 60 feet taller than rabbits. How many chickens and rabbits are there each?
Exercise 2:
1. Chickens and rabbits live in the same cage. There are 30 more chickens than rabbits, with a total of 168 legs. How many chickens and rabbits are there?
2. Chickens and rabbits live in the same cage. There are 25 more chickens than rabbits, and a total of 170 legs. How many chickens and rabbits are there?
3. Buy two types of theater tickets, A and B. Type A tickets cost 4 yuan each, and type B tickets cost 3 yuan each. Type B tickets bought 9 more tickets than type A tickets. They were used for a total of 97 yuan, how many tickets of each type did you buy?
4. There are 48 chicken and rabbit legs in total. If the number of chickens and rabbits is swapped, there will be a total of 42 chicken and rabbit legs.
Exercise 3:
1. A certain school organized a mathematics competition. Each correct question received 9 points, and each incorrect question was deducted 3 points. There were 12 questions in total. , and Xiao Ming gained 84 points, how many questions did he get wrong?
2. A primary school organized an English competition. Each correct answer was worth 10 points, and each incorrect answer was deducted 2 points. There were 15 questions in total. He got102 points. right.How many questions?
3. A company transports 400 boxes of shirts and stipulates that the freight per box is 30 yuan. If a box is lost, not only will no freight be paid, but 100 yuan compensation will be required. The freight payment after shipment is 8,880 yuan. Question: How many boxes were lost in this shipment?
4. A certain workshop produces a batch of 250 clothes, and you can get 25 yuan for each piece produced. If any part does not meet the requirements, 20 yuan will be deducted and the cost. after production will be 5,350 yuan. How many items are unqualified?
Exercise 4:
1. The number of pieces of fruit candy is three times that of chocolate candy if Xiao Ming eats 2 pieces of fruit candy and 1 piece chocolate candies. day, after a few days, the number of fruit candies will be 7. There are still 7 candies left, and the bOur chocolate candies have just finished. How many pieces of fruit candy are there?
2. Xiao Ming's family has apples and pears. The number of apples is three times that of pears. Dad and Xiao Ming each eat an apple every day, and Mom eats a pear every day. A few days later, there are 9 apples left, and all the pears are eaten. How many apples are there?
3. There are red balloons and yellow balloons in a certain store. The number of red balloons is 4 times greater than that of yellow balloons. 2 red balloons and 1 yellow balloon are sold every day. , the red balloons remain 12 pieces, the yellow balloons have just been used up. How many red balloons are there?
4. Class 4 (3) has several boxes of colored chalk and white chalk. The number of boxes of white chalk is 7 times that of colored chalk. She uses 2 boxes of white chalk and 1 box of white chalk.of colored chalk every day. When all the chalk is used up, 10 boxes of white chalk remain. How many boxes of white chalk are there?
Exercise 5:
1. The school purchased 8 desks and 6 chairs, at a total cost of 1,650 yuan. The price of each desk is double that of each chair. How much does each desk and chair cost?
2. It costs 252 yuan to buy 4 desks and 9 chairs. The price of a table and 3 chairs is exactly the same. What is the unit price of the table and chairs?
3. The school bought 4 basketballs and 5 volleyballs for a total of 185 yuan. It is known that a basketball costs 8 yuan more than a volleyball, so how much are the unit prices of basketballs and volleyballs. ?
4. Xiao Ming bought 2 table tennis balls and 4 rubber balls for a total of 52 yuan. The price of 6 table tennis balls is equivalent toprice of a rubber ball. What is the unit price of table tennis balls and rubber balls?