Practical problems 6 marks : Solve 6 practical problems

60 days to complete.

Specific answer: Assuming that the planned completion time is x, then 50 are processed per day, and the completion time is (x+8), and 60 are processed per day, and the completion time is (x-5), and the total number of processing is the same, so we can solve x,50(x+8)=60(x-5) according to the equation of the same column with the total number

Solve for x=70, then it takes time to do 65 times a day t=(70-5)*60 65=60 days.

Set the plan to be completed in x days.

The number of parts is: 50 (x+8) or 60 (x-5) 50 (x+8) = 60 (x-5).

Solution x=70

So the number of parts is 50*(70+8)=3900

3900 65 = 60 days.

A: It takes 60 days to complete.

Solution: Set the plan to be completed in x days.

50（x＋8）=60（x-5）

x=7070-5) 60=3900 (pcs).

3900 65 = 60 days.

A: If you do 65 pieces a day, it will be completed in 60 days.

Set x days to complete, there is.

50*（x+8）=60*（x-5）

Solution x=70

The total amount is (70 + 8) * 50 = 3900.

3900 65 = 60 days.

There are x parts.

x/50-8=x/60+5

x=3900

Do 65 per day for 60 days.

Hello. There are x parts.

List the equations according to the meaning of the topic: x 50-8 = x 60 + 5 solve the equation to get x = 3900

So there are 3900 parts in total.

Hope it helps.

If the bees fall on the flower by 3 times the difference between the bees, there will be 2 bees left, how many bees are there in this group?

4. It takes 2 days for the calf to travel from the county seat to the provincial capital by car, he walked the whole journey of 1 2 and 72 kilometers on the first day, and the distance he walked on the second day is equal to 1 2 on the first day, seeking the distance from the county seat to the provincial capital.

5. There are 360 students in the sixth grade of Guangming Primary School, of which 7 are girls, and a few girls were transferred later, so that girls account for 60% of the total number of students in the sixth grade, how many girls are transferred?

7. The People's Machinery Factory processes a batch of parts, workshop A processes 20% of this batch of parts, workshop B processes the remaining 25%, workshop C processes the remaining 40%, and there are 3,600 left unprocessed, how many parts are there in this batch?

10. The gas collector went to a building to collect the gas price difference, and when he walked out of the building, he counted that the number of households that had not paid accounted for 1 8 of the number of households that had paid. If 2 households are underpaid, the number of households that have not paid is exactly 1 6 of the number of households that have paid, how many households are there in this building?

11. A workshop produces two kinds of parts: A and B. The production of a part is 12 more than the B part, B parts are all qualified, a part is only 4 5 qualified, the two parts are qualified a total of 42, how many two parts are produced?

Answer with a score, please give me a lot of advice, and it is best to add an explanation o ( o thank you.

There is too much content, there is no bounty, who gives it to you.

You didn't finish the first question!!

2. Master Wang processes a part, from the original 12 minutes to 8 minutes each, the original 300 per day, how many are processed per day?

450 pcs. 3. Uncle Wang participates in the county's rural cooperative medical insurance. The clause stipulates that the minimum payment line for farmers' hospitalization medical expenses shall be set up, and the county-level medical institutions shall be 400 yuan, and the part above the minimum payment line shall be compensated at 45%.

In April this year, Uncle Wang suffered from acute enteritis and was hospitalized in a designated hospital for 20 days, with a total medical expenses of 8,260 yuan. According to the terms, how much yuan does Uncle Wang have to pay?

4323 yuan.

4. In the art class, the art teacher prepared cubic centimeters of plasticine for each group (a group of 4 people), and asked each person to pinch out a cone with a bottom diameter of 2 cm. Excuse me: How high is this cone in centimeters?

2 2 = 1 cm.

2 cm. 5. Car A and car B depart from the east and west cities at the same time, car A meets car B at a place that exceeds the midpoint 20 kilometers, and it is known that the ratio of the distance taken by car A to the distance traveled by car B is 7 6, how many kilometers are the distance between the east and west cities?

20 (7/13 minus 6/13).

260 km.

6. In the construction of the new socialist countryside, a construction company undertakes the road hardening project in Dashadi Village, and it takes 15 days for engineering team A to do it alone, and it takes 10 days for engineering team B to do it alone. After 5 days of joint repair, due to ice disasters in other places, the road was destroyed, and the company needed to dispatch an engineering team to participate in the emergency repair battle, which engineering team do you think will be transferred? Why.

How many days will it take for the remaining engineering team to complete the project?

1-(15 points to 1 + 1/10)*5

1-5 out of six.

Sixth. 1/6 1/15 = 1/6 * 15 = 1/6 of a day.

Send Team B to the rescue, because Team B has high work efficiency.

Question 1, Xiaohong's mother's birthday is February 29, 2008 is the closest leap year from 2009, 2008-4 10=1968, Xiaohong's mother was born in 1968, she is 41 years old this year.

Question 2: I started at 3 o'clock and ended at 8 o'clock, a total of 5 hours.

Question 3, all sixty dozens, a total of 10. 540 (10-1)=60Question 4: Still 18 years old, one of Xiaolan's grandmothers died at the age of 18.

Question 5: Take the goats across the river first, and return empty; Cross the river with the wolf and return with the goats; cross the river with greens and return empty-boated; Take the goats across the river again.

Problem Fill the large pot and pour it into the 5 litre small kettle, at this time the 7 litre jug has 2 litres of water left; The 5-liter pot is emptied, and the remaining amount of water from the 7-liter large pot is poured into the 5-liter kettle, and there are 2 liters of water in the 5-liter kettle; The 7-liter jug is full, and you can only get 3 litres when you pour it into a small 5-litre jug with water, and at this time, there are exactly 4 litres of water in the 7-litre jug.

The velocity in the vein is 50*2 5 = 20 cm seconds.

The velocity in the capillaries is 20*1 40 = cm seconds.

Combined formula: 50*2 5*1 40=cms.

Solution: Set 3x yuan for A and 4x yuan for B in February.

3x+30):(4x+50)=5:7 – the basic property of the ratio 7(3x+30)=5(4x+50).

21x+210=20x+250

x=403x=120

4x=160

Answer: In February, A deposits 120 yuan and B 160 yuan.

I'm glad to answer your questions and wish you progress in your studies! The [Born for Dreams] team will answer questions for you.

If A is 3x yuan in February, then B is 4x yuan.

3x+30）：（4x+50）＝5：7

20x+250＝21x+210

x 40 is $120 for February A and $160 for February.

Your (5+7)-(3+4) is not right, because this is the ratio, the amount of each serving is different, for example, 3:4, the amount of each serving is 40 yuan, and 5:7, the amount of each serving is 30 yuan, so you can't add or subtract like that.

Let the total amount of money saved by B and A in February be x yuan, according to the title:

3x/7＋30):(4x/7+50)=5:7

Solution: Let B be x yuan and A be 3 4x

3/4x+30):(x+50)=5:7

x=560 A is 420 yuan, B is 560 yuan.