2. There are three grasslands with an area of 5 15 and 24 mu respectively. The grass on the grassland is as thick and grows as fast. The first grassland can feed 10 cows for 30 days, and the second grassland can feed 28 cows for 45 days. How many cows can eat on the third grass for 80 days?

There is a rectangular iron block in the cylindrical container. Now turn on the tap and pour the water into the container. In 3 minutes, the water surface is just above the top of the cuboid. /kloc-After 0/8 minutes, the container has been filled with water. It is known that the height of a container is 50 cm and the height of a cuboid is 20 cm. Find the ratio of the bottom area of a cuboid to the bottom area of a container.

6. There are two water pipes A and B, and water is injected into two pools with the same size at the same time. At the same time, the water injection ratio of A and B is 7: 5. After 2+ 1/3 hours, the sum of the water injected into A and B is just a pool. At this time, the water injection rate of pipe A is increased by 25%, while pipe B remains unchanged.

Xiao Ming walks from home to school in the morning. When he ran halfway, his father found that Xiao Ming's math book was left at home, and then he rode to deliver it to Xiao Ming. When he caught up, Xiao Ming still had 3/ 10 to go. Xiao Ming got on his father's car at once and was sent to school by his father, so Xiao Ming arrived at school five minutes earlier than walking alone. How long does it take Xiaoming to walk from home to school?

8. Car A and car B both start from place A and pass through place B to place C. The distance between the two places is equal to the distance from place B to place C. The speed of car B is 80% of that of car A. It is known that car B started earlier than car A 1 1 minute, but stayed in place B for 7 minutes, but car A drove all the way to place C. Finally, car B was later than car A..

9. Two cleaning vehicles, A and B, perform road cleaning tasks between things. It takes 10 hour for car A to be cleaned alone, and 15 hour for car B to be cleaned alone. Two cars leave from east and west at the same time. When they met, car A was cleaner than car B12km. How many kilometers is it between East and West?

/kloc-4 containers of 0/0.3 tons, 5 containers of 2.5 tons, 1 0.5 tons/4 containers, and 7 containers of1ton. So how many cars with a load of 4.5 tons are needed to transport all the containers at once?

Comprehensive Training of Mathematical Application Problems in Primary Schools (02)

1 1. Both the master and the apprentice * * * processed 170 parts, and the number of parts processed by the master was 1/3 more than that processed by the apprentice, so how many parts did the apprentice process?

12. Both a cart and a car drive from A to B, and the speed of the cart is 80% of that of the car. It is known that the big car started 17 minutes earlier than the small car, but it stopped at the midpoint of the two places for 5 minutes before continuing to B. However, after the small car started, it went straight to the second place without stopping. Finally, the bus came second before the bus. It is also known that the bus departs from the first place at 10 in the morning. So when did the bus catch up with the bus in the morning?

13. For a manuscript, it takes 14 hours for Party A to type alone, and 20 hours for Party B to type alone. If Party A types 1 hour first, then Party B types 1 hour instead of Party A, and then Party A types 1 hour instead of Party B. .................................................................

1There are 3 yellow balloons in 4.2 yuan and 2 flower balloons in 3 yuan. The school * * * bought 32 balloons, 4 of which were fewer than yellow balloons. What balloons do schools spend more money on?

15. The sailing speed is 60m/min. In a river with a current speed of 20 meters per minute, the ship travels from the upstream port to the downstream place, and then returns to its original place. * * * How many meters did the ship walk from the upstream port to the downstream in 3 hours and 30 minutes?

16. Granary A contains 43 tons of flour and Granary B contains 37 tons of flour. If the flour from granary B is loaded into granary A, the remaining flour after granary B is full accounts for 1/2 of granary B's capacity. If the flour from granary A is put into granary B, after granary B is full, the remaining flour from granary A accounts for 1/3 of granary A's capacity. How many tons of flour can each granary hold?

17. When A is divided by B and B is divided by C, the quotient is equal and the remainder is 2. The sum of A and B is 478. So what is the sum of a, b and c?

18. A car traveling from A to B will arrive 1 hour later than the original time if it slows down 10%. If you drive at the original speed 1 80km, you will arrive1hour earlier than the original time. What's the distance between a and b?

19. A school participated in the military training queue performance competition and organized a phalanx team. If there are 60 students in each class, there must be at least 4 classes in this phalanx. If there are 70 students in each class, there must be at least 3 classes in this phalanx. How many people should this phalanx consist of?

20.a, B and C lathes process square and round parts. It is known that two out of every three parts machined by lathe are round; Three out of every four parts machined by lathe B are round; Four fifths of the parts processed by lathe C are round. On this day, three lathes * * * processed 58 round parts, and the number ratio of square parts processed was 4: 3: 3. So how many parts were processed by the three lathes on this day?

Comprehensive Training of Mathematical Application Problems in Primary Schools (03)

2 1. The length of circular metal wire is 30m, and three metal wires with length a are intercepted and five metal wires with length b are intercepted. If two metal wires with length b are intercepted, the remaining metal wires are 0.4m shorter, and if two metal wires with length a are intercepted, they are 2m shorter. How many meters is the length a?

22. A company wants to transport two kinds of building materials, A and B, to the construction site. Building materials A weigh 700kg each, including 120 * * *, and building materials B weigh 900kg each, including 80 * * *. It is known that a car can transport up to 4 tons at a time, so how many times do five identical cars have to be transported at the same time?

23. The distance from Wang Lijia to the school is longer than the distance to the gymnasium 1/4. One day, Wang Li watched the game in the gym and walked home in 17 minutes. After a short rest, it took him 25 minutes to walk to school, which was slower than coming back from the gym 15 meters. How far is it from Wang Lijia to school?

24. Master and apprentice cooperate to complete a project. Because of their good cooperation, the master's work efficiency has been improved110, and the apprentice's work efficiency has been improved 1/5. After six days of cooperation, two-fifths of the whole project was completed, and then the apprentice worked alone for six days. At this time, the project still has 65438+.

25. Students in five classes of Grade Six planted 65,438+000 trees. As we all know, the number of trees planted in each class is different, and the ranking from the most to the least is just 1, 2, 3, 4 and 5 classes. It is also known that the number of trees planted in 1 is the sum of the number of trees planted in Class 2 and Class 3, and the number of trees planted in Class 2 is the sum of the number of trees planted in Class 4 and Class 5.

26. A runs 13 km per hour, B runs 1 1 km per hour, and B runs 20 minutes longer than A. As a result, B runs 2 km longer than A. How many kilometers did B run?

27. There are two cylindrical containers, A and B, with inner diameters of 6 cm and 8 cm respectively. Container A is full of water and container B is empty. All the water in container A was poured into container B, and the water depth in container B was measured to be 2 cm lower than 7/8 of the container height. What is the height of the container?

28. The cargo 104 tons is transported by 9-ton truck. It is known that a car needs 1 hour for each round trip. In fact, every time the car is loaded 1 ton, it can be completed a few hours in advance.

29. On the first day, master and apprentice processed 225 parts, and on the second day, new technology was adopted. The number of parts processed by the master increased by 24% compared with the first day, and the number of apprentices increased by 45%. Two people processed 300 parts. How many parts did the master process the next day? How many parts did the apprentice process?

30. Struggle Primary School organizes sixth-grade students to go camping and training in Baihua Mountain, and the journey is increased by 2 kilometers every day. I went for four days and came back for three days. How many kilometers is the school from Baihua Mountain?

1. Party A, Party B and Party C plant trees in two plots A and B respectively, with 900 trees in plot A and 0/250 trees in plot B. It is known that Party A, Party B and Party C can plant 24, 30 and 32 trees every day, of which Party A plants trees in plot B, and Party B plants trees in plot A first and then moves to plot B..

3. A project, contracted by both parties, can be completed in 2.4 days and needs to be paid 1800 yuan; Contracted by Team B and Team C, it can be completed in 3+3/4 days, and it needs to be paid 1500 yuan; Contracted by two teams, Party A, Party B and Party C, it can be completed in 2+6/7 days at a cost of 1.600 yuan. On the premise of ensuring the completion within one week, which team will spend the least?

There is a rectangular iron block in the cylindrical container. Now turn on the tap and pour the water into the container. In 3 minutes, the water surface is just above the top of the cuboid. /kloc-After 0/8 minutes, the container has been filled with water. It is known that the height of a container is 50 cm and the height of a cuboid is 20 cm. Find the ratio of the bottom area of a cuboid to the bottom area of a container.

Two bosses, A and B, bought a fashion at the same price, and B bought 1/5 sets more than A, and then they sold them at profit margins of 80% and 50% respectively. After both of them were sold out, A still made more profits than B, just enough for him to buy 65,438+00 sets of this fashion, which A bought at the beginning.

6. There are two water pipes A and B, and water is injected into two pools with the same size at the same time. At the same time, the water injection ratio of A and B is 7: 5. After 2+ 1/3 hours, the sum of the water injected into A and B is just a pool. At this time, the water injection rate of pipe A is increased by 25%, while pipe B remains unchanged.

Xiao Ming walks from home to school in the morning. When he ran halfway, his father found that Xiao Ming's math book was left at home, and then he rode to deliver it to Xiao Ming. When he caught up, Xiao Ming still had 3/ 10 to go. Xiao Ming got on his father's car at once and was sent to school by his father, so Xiao Ming arrived at school five minutes earlier than walking alone. How long does it take Xiaoming to walk from home to school?

8. Car A and car B both start from place A and pass through place B to place C. The distance between the two places is equal to the distance from place B to place C. The speed of car B is 80% of that of car A. It is known that car B started earlier than car A 1 1 minute, but stayed in place B for 7 minutes, but car A drove all the way to place C. Finally, car B was later than car A..

9. Two cleaning vehicles, A and B, perform road cleaning tasks between things. It takes 10 hour for car A to be cleaned alone, and 15 hour for car B to be cleaned alone. Two cars leave from east and west at the same time. When they met, car A was cleaner than car B12km. How many kilometers is it between East and West?

/kloc-4 containers of 0/0.3 tons, 5 containers of 2.5 tons, 1 0.5 tons/4 containers, and 7 containers of1ton. So how many cars with a load of 4.5 tons are needed to transport all the containers at once?

Comprehensive Training of Mathematical Application Problems in Primary Schools (02)

1 1. Both the master and the apprentice * * * processed 170 parts, and the number of parts processed by the master was 1/3 more than that processed by the apprentice, so how many parts did the apprentice process?

12. Both a cart and a car drive from A to B, and the speed of the cart is 80% of that of the car. It is known that the big car started 17 minutes earlier than the small car, but it stopped at the midpoint of the two places for 5 minutes before continuing to B. However, after the small car started, it went straight to the second place without stopping. Finally, the bus came second before the bus. It is also known that the bus departs from the first place at 10 in the morning. So when did the bus catch up with the bus in the morning?

13. For a manuscript, it takes 14 hours for Party A to type alone, and 20 hours for Party B to type alone. If Party A types 1 hour first, then Party B types 1 hour instead of Party A, and then Party A types 1 hour instead of Party B. .................................................................

1There are 3 yellow balloons in 4.2 yuan and 2 flower balloons in 3 yuan. The school * * * bought 32 balloons, 4 of which were fewer than yellow balloons. What balloons do schools spend more money on?

15. The sailing speed is 60m/min. In a river with a current speed of 20 meters per minute, the ship travels from the upstream port to the downstream place, and then returns to its original place. * * * How many meters did the ship walk from the upstream port to the downstream in 3 hours and 30 minutes?

16. Granary A contains 43 tons of flour and Granary B contains 37 tons of flour. If the flour from granary B is loaded into granary A, the remaining flour after granary B is full accounts for 1/2 of granary B's capacity. If the flour from granary A is put into granary B, after granary B is full, the remaining flour from granary A accounts for 1/3 of granary A's capacity. How many tons of flour can each granary hold?

17. When A is divided by B and B is divided by C, the quotient is equal and the remainder is 2. The sum of A and B is 478. So what is the sum of a, b and c?

18. A car traveling from A to B will arrive 1 hour later than the original time if it slows down 10%. If you drive at the original speed 1 80km, you will arrive1hour earlier than the original time. What's the distance between a and b?

19. A school participated in the military training queue performance competition and organized a phalanx team. If there are 60 students in each class, there must be at least 4 classes in this phalanx. If there are 70 students in each class, there must be at least 3 classes in this phalanx. How many people should this phalanx consist of?

20.a, B and C lathes process square and round parts. It is known that two out of every three parts machined by lathe are round; Three out of every four parts machined by lathe B are round; Four fifths of the parts processed by lathe C are round. On this day, three lathes * * * processed 58 round parts, and the number ratio of square parts processed was 4: 3: 3. So how many parts were processed by the three lathes on this day?

Comprehensive Training of Mathematical Application Problems in Primary Schools (03)

2 1. The length of circular metal wire is 30m, and three metal wires with length a are intercepted and five metal wires with length b are intercepted. If two metal wires with length b are intercepted, the remaining metal wires are 0.4m shorter, and if two metal wires with length a are intercepted, they are 2m shorter. How many meters is the length a?

22. A company wants to transport two kinds of building materials, A and B, to the construction site. Building materials A weigh 700kg each, including 120 * * *, and building materials B weigh 900kg each, including 80 * * *. It is known that a car can transport up to 4 tons at a time, so how many times do five identical cars have to be transported at the same time?

23. The distance from Wang Lijia to the school is longer than the distance to the gymnasium 1/4. One day, Wang Li watched the game in the gym and walked home in 17 minutes. After a short rest, it took him 25 minutes to walk to school, which was slower than coming back from the gym 15 meters. How far is it from Wang Lijia to school?

24. Master and apprentice cooperate to complete a project. Because of their good cooperation, the master's work efficiency has been improved110, and the apprentice's work efficiency has been improved 1/5. After six days of cooperation, two-fifths of the whole project was completed, and then the apprentice worked alone for six days. At this time, the project still has 65438+.

25. Students in five classes of Grade Six planted 65,438+000 trees. As we all know, the number of trees planted in each class is different, and the ranking from the most to the least is just 1, 2, 3, 4 and 5 classes. It is also known that the number of trees planted in 1 is the sum of the number of trees planted in Class 2 and Class 3, and the number of trees planted in Class 2 is the sum of the number of trees planted in Class 4 and Class 5.

26. A runs 13 km per hour, B runs 1 1 km per hour, and B runs 20 minutes longer than A. As a result, B runs 2 km longer than A. How many kilometers did B run?

27. There are two cylindrical containers, A and B, with inner diameters of 6 cm and 8 cm respectively. Container A is full of water and container B is empty. All the water in container A was poured into container B, and the water depth in container B was measured to be 2 cm lower than 7/8 of the container height. What is the height of the container?

28. The cargo 104 tons is transported by 9-ton truck. It is known that a car needs 1 hour for each round trip. In fact, every time the car is loaded 1 ton, it can be completed a few hours in advance.

29. On the first day, master and apprentice processed 225 parts, and on the second day, new technology was adopted. The number of parts processed by the master increased by 24% compared with the first day, and the number of apprentices increased by 45%. Two people processed 300 parts. How many parts did the master process the next day? How many parts did the apprentice process?

30. Struggle Primary School organizes sixth-grade students to go camping and training in Baihua Mountain, and the journey is increased by 2 kilometers every day. I went for four days and came back for three days. How many kilometers is the school from Baihua Mountain?

1. Party A, Party B and Party C plant trees in two plots A and B respectively, with 900 trees in plot A and 0/250 trees in plot B. It is known that Party A, Party B and Party C can plant 24, 30 and 32 trees every day, of which Party A plants trees in plot B, and Party B plants trees in plot A first and then moves to plot B..

2. There are three grasslands with an area of 5 15 and 24 mu respectively. The grass on the grassland is as thick and grows as fast. The first grassland can feed 10 cows for 30 days, and the second grassland can feed 28 cows for 45 days. How many cows can eat on the third grass for 80 days?

3. A project, contracted by both parties, can be completed in 2.4 days and needs to be paid 1800 yuan; Contracted by Team B and Team C, it can be completed in 3+3/4 days, and it needs to be paid 1500 yuan; Contracted by two teams, Party A, Party B and Party C, it can be completed in 2+6/7 days at a cost of 1.600 yuan. On the premise of ensuring the completion within one week, which team will spend the least?

Two bosses, A and B, bought a fashion at the same price, and B bought 1/5 sets more than A, and then they sold them at profit margins of 80% and 50% respectively. After both of them were sold out, A still made more profits than B, just enough for him to buy 65,438+00 sets of this fashion, which A bought at the beginning.

6. There are two water pipes A and B, and water is injected into two pools with the same size at the same time. At the same time, the water injection ratio of A and B is 7: 5. After 2+ 1/3 hours, the sum of the water injected into A and B is just a pool. At this time, the water injection rate of pipe A is increased by 25%, while pipe B remains unchanged.

Xiao Ming walks from home to school in the morning. When he ran halfway, his father found that Xiao Ming's math book was left at home, and then he rode to deliver it to Xiao Ming. When he caught up, Xiao Ming still had 3/ 10 to go. Xiao Ming got on his father's car at once and was sent to school by his father, so Xiao Ming arrived at school five minutes earlier than walking alone. How long does it take Xiaoming to walk from home to school?

8. Car A and car B both start from place A and pass through place B to place C. The distance between the two places is equal to the distance from place B to place C. The speed of car B is 80% of that of car A. It is known that car B started earlier than car A 1 1 minute, but stayed in place B for 7 minutes, but car A drove all the way to place C. Finally, car B was later than car A..

9. Two cleaning vehicles, A and B, perform road cleaning tasks between things. It takes 10 hour for car A to be cleaned alone, and 15 hour for car B to be cleaned alone. Two cars leave from east and west at the same time. When they met, car A was cleaner than car B12km. How many kilometers is it between East and West?

/kloc-4 containers of 0/0.3 tons, 5 containers of 2.5 tons, 1 0.5 tons/4 containers, and 7 containers of1ton. So how many cars with a load of 4.5 tons are needed to transport all the containers at once?

Comprehensive Training of Mathematical Application Problems in Primary Schools (02)

1 1. Both the master and the apprentice * * * processed 170 parts, and the number of parts processed by the master was 1/3 more than that processed by the apprentice, so how many parts did the apprentice process?

12. Both a cart and a car drive from A to B, and the speed of the cart is 80% of that of the car. It is known that the big car started 17 minutes earlier than the small car, but it stopped at the midpoint of the two places for 5 minutes before continuing to B. However, after the small car started, it went straight to the second place without stopping. Finally, the bus came second before the bus. It is also known that the bus departs from the first place at 10 in the morning. So when did the bus catch up with the bus in the morning?

13. For a manuscript, it takes 14 hours for Party A to type alone, and 20 hours for Party B to type alone. If Party A types 1 hour first, then Party B types 1 hour instead of Party A, and then Party A types 1 hour instead of Party B. .................................................................

1There are 3 yellow balloons in 4.2 yuan and 2 flower balloons in 3 yuan. The school * * * bought 32 balloons, 4 of which were fewer than yellow balloons. What balloons do schools spend more money on?

15. The sailing speed is 60m/min. In a river with a current speed of 20 meters per minute, the ship travels from the upstream port to the downstream place, and then returns to its original place. * * * How many meters did the ship walk from the upstream port to the downstream in 3 hours and 30 minutes?

16. Granary A contains 43 tons of flour and Granary B contains 37 tons of flour. If the flour from granary B is loaded into granary A, the remaining flour after granary B is full accounts for 1/2 of granary B's capacity. If the flour from granary A is put into granary B, after granary B is full, the remaining flour from granary A accounts for 1/3 of granary A's capacity. How many tons of flour can each granary hold?

17. When A is divided by B and B is divided by C, the quotient is equal and the remainder is 2. The sum of A and B is 478. So what is the sum of a, b and c?

18. A car traveling from A to B will arrive 1 hour later than the original time if it slows down 10%. If you drive at the original speed 1 80km, you will arrive1hour earlier than the original time. What's the distance between a and b?

19. A school participated in the military training queue performance competition and organized a phalanx team. If there are 60 students in each class, there must be at least 4 classes in this phalanx. If there are 70 students in each class, there must be at least 3 classes in this phalanx. How many people should this phalanx consist of?

20.a, B and C lathes process square and round parts. It is known that two out of every three parts machined by lathe are round; Three out of every four parts machined by lathe B are round; Four fifths of the parts processed by lathe C are round. On this day, three lathes * * * processed 58 round parts, and the number ratio of square parts processed was 4: 3: 3. So how many parts were processed by the three lathes on this day?

Comprehensive Training of Mathematical Application Problems in Primary Schools (03)

2 1. The length of circular metal wire is 30m, and three metal wires with length a are intercepted and five metal wires with length b are intercepted. If two metal wires with length b are intercepted, the remaining metal wires are 0.4m shorter, and if two metal wires with length a are intercepted, they are 2m shorter. How many meters is the length a?

22. A company wants to transport two kinds of building materials, A and B, to the construction site. Building materials A weigh 700kg each, including 120 * * *, and building materials B weigh 900kg each, including 80 * * *. It is known that a car can transport up to 4 tons at a time, so how many times do five identical cars have to be transported at the same time?

23. The distance from Wang Lijia to the school is longer than the distance to the gymnasium 1/4. One day, Wang Li watched the game in the gym and walked home in 17 minutes. After a short rest, it took him 25 minutes to walk to school, which was slower than coming back from the gym 15 meters. How far is it from Wang Lijia to school?

24. Master and apprentice cooperate to complete a project. Because of their good cooperation, the master's work efficiency has been improved110, and the apprentice's work efficiency has been improved 1/5. After six days of cooperation, two-fifths of the whole project was completed, and then the apprentice worked alone for six days. At this time, the project still has 65438+.

25. Students in five classes of Grade Six planted 65,438+000 trees. As we all know, the number of trees planted in each class is different, and the ranking from the most to the least is just 1, 2, 3, 4 and 5 classes. It is also known that the number of trees planted in 1 is the sum of the number of trees planted in Class 2 and Class 3, and the number of trees planted in Class 2 is the sum of the number of trees planted in Class 4 and Class 5.

26. A runs 13 km per hour, B runs 1 1 km per hour, and B runs 20 minutes longer than A. As a result, B runs 2 km longer than A. How many kilometers did B run?

27. There are two cylindrical containers, A and B, with inner diameters of 6 cm and 8 cm respectively. Container A is full of water and container B is empty. All the water in container A was poured into container B, and the water depth in container B was measured to be 2 cm lower than 7/8 of the container height. What is the height of the container?

28. The cargo 104 tons is transported by 9-ton truck. It is known that a car needs 1 hour for each round trip. In fact, every time the car is loaded 1 ton, it can be loaded a few hours earlier.

First, think about it and fill it out. (2 points for each small question, ***24 points)

1. Artists use the transformations of (), () and () in geometry to design many beautiful patterns.

2, () cubic meters =98 cubic decimeters = () liters.

3. Fill in the appropriate units:

(1) a bottle of mineral water around 500 yuan (); ② A bottle of eye drops is about 10 (): ③ The volume of freight container is about 5 ().

4. Natural numbers (except 0) can be divided into (), () and () according to the number of factors.

5, a three-digit number, the number in the tenth place is an appropriate prime number, the number in the last place is three times that in the tenth place, and the number in the hundredth place is 2 larger than that in the last place. This three-digit number is ().

6. The length of a cube is 48 cm and the volume is () cubic cm.

7, a rectangular pool, 6 meters long, 3 meters wide and 3 meters deep, covers an area of (), its volume is ().

8. Put two cuboids with the same size into a cube. The side length of this cube is 10 cm. The original cuboid has a surface area of () square centimeters and a volume of () cubic centimeters.

9. Enclose a square wire frame with 12m long wires. The length of three sides is () of the total length, and the length of each side is () meters.

10, the fraction X/5, when X= (), is the decimal unit of this fraction; When X= (), it is the maximum true score; When X= (), it is the smallest mistake; When X= (), it is the smallest band score.

1 1, one wire was cut by 3/5 meters, and the rest was more than 3/5 meters. This wire used to be 20 meters long.

12, 9/ 10, 0.89, 3/4, 6/5, 0.7 and 8/9 are arranged in descending order: () ∞ () ∞ () ∞ ()

Second, choose carefully. Fill in the brackets with the letters of the correct answer. 65438+ 0 points for each small question, ***6 points)

1, rotation and translation just change the graph ().

A, size b, shape c, position d, direction

2. Fold a rectangular piece of paper four times in a row, one of which is paper ().

a、 1/4 B、 1/8 C、 1/ 12 D、 1/ 16

3. The side length of a square is a prime number, and its area must be ().

A, prime number b, composite number c, even number d, odd number

4, at the same time is a multiple of 2, 3, 5, the largest three digits is ().

a、 120 B、990 C、960 D、930

5. Cut a cube bread with a side length of 4 cm into cube buns with a side length of 10 cm, and you can cut at most () pieces.

a、4 B、 16 C、32 D、64

6. Xiaoming arrived at school 38/7 minutes earlier, Xiaohong arrived at school 5.4 minutes earlier and Xiaogang arrived at school 163/30 minutes earlier. () Go to school first.

A, Xiaoming B, Xiaohong C, Xiaogang D, uncertain

Third, judge right or wrong. (Mark "√" correctly in brackets, and mark "×" incorrectly. 65438+ 0 points for each small question, ***8 points)

1. The cube has two axes of symmetry. - ( )

2. All sides of a cuboid must be rectangular. - ( )

3. Any nonzero natural number has at least two factors. - ( )

4.A is divisible by B. The greatest common factor of a and b is A..- ()

5. The fraction whose numerator and denominator are prime numbers is called simplest fraction. - ( )

6. The relationship between the fraction expressed by letters and division is: A/B = A ÷ B.-()

7,3/24 cannot be reduced to a finite decimal. - ( )

8. You cannot write a score greater than 1/6 and less than 1/5. - ( )

Fourth, calculation. (6+8+6+6+6=20 points)

1, a number written directly. (0.5 points for each small question, ***6 points)

0. 125+7/8 = 1/3+ 1/4 = 1- 1/9 = 5/ 12+5/24 = 12.5 x 0. 1 = 1-8/9- 1/9 =

9.8÷0.0 1= 3.4+ 13= 1.08+ 1/2= 5/8+ 1/4= 4/5-0.2-0.4= 2/5+5/6+3/5=

2. Calculation can be simplified. (2 points for each small question, ***8 points)

5-3/7-4/7 8/9+ 1/3+2/3 1/2+3/5- 1 1/20 1/2+( 1/3- 1/5)

3. Solve the equation. (2 points for each small question, ***6 points)

① X+ 1/5-4/35=27

②3X-6.75 = 33/4③X-( 1-3/7)= 1/4

4. Column calculation. (3 points for each small question, ***6 points)

①65 minus a few 2.5, leaving 17.5?

② The sum of half of a number and 20 is 120. Find this number.

5, graphic observation, calculation. (3 points for each small question, ***6 points)

Fifth, solve the problem. (5 points for each small question, ***30 points)

1. Xiaoming's mother went to the supermarket to buy milk. There are three kinds of bottled milk. Which do you think is the most cost-effective? Why?

① 250ml/2.00 yuan ② 500ml/4.60 yuan ③ 1L/9.00 yuan.

2. Spread a layer of 4 cm thick sand on a rectangular plot 45 meters long and 28 meters wide. If a car can only transport 3.5 cubic meters of sand at a time, how many times must the car transport it at least?

3. The wood length of a cuboid is1.2m.. If the saw is cut short by 2 decimeters, its volume will be reduced by 40 cubic decimeters. Find the volume of log block.

4. Dongdong's family has some eggs, including five numbers of 5, six numbers of 6 and 12 12, all of which are four watches. These eggs are known to be between 100 and 130. Do you know how many eggs Dongdong has?

5. There is a coal yard. On the first day, 13 tons of coal was sold. The second day sold less than the first day 1/4 tons. The second day sold 3/5 tons more than the third day. How much coal was sold on the third day?

6. The sum of numerator and denominator of a fraction is 30. After adding 22 to the denominator, you get a new score. Turning this new score into the simplest score is 1/3. What was the initial score?

I am happy to help others.

I am happy to help others.