Answer 10 for solving problems in decimal division

1. How many hours does it take for Sanyou factory to produce 108 parts in 6 hours, [1800 parts]?

Equation: 1800 [108 6].

2. There are 400 kilograms of rice in the school canteen, and the amount of flour stored is 10,000 less than the times of rice.

2. Solve problems.

1. The pencil factory has tons of wood, if the kilogram can produce 160 pencils, according to this calculation, how many pencils can be produced from the original wood?

Tons = 420 kg, 420x (160 28000 pieces).

2. An off-road vehicle travels thousands of kilometers in the desert and consumes liters of fuel.

1} How many liters of gasoline does he have to prepare for crossing an uninhabited desert area with a total distance of 1,300 kilometers?

1) 1. Production of 1800 parts*.

II42*1000/。2、(1)1300/(，(2)120/(

That's it, just figure it out. Hope!

A 1: One worker produces 1800 parts.

2: There is no equation!!

II 1: Tons = 420 kg 420 [.]

1) 1. Production of 1800 parts*.

2. How many kilograms of flour are in the school canteen.

II42x1000 or

There are three people in ABC who produce shoes, A produces 4 pairs in one hour, B produces 5 pairs in one hour, and C produces 6 pairs in one hour.

Q: What is the average time to produce a pair of shoes?

Method 1: To produce a pair of shoes, the time taken by ABC three people is 15 minutes, 12 minutes, 10 minutes, and the average time is naturally (15+12+10) 3=37 3

A2: If each person produces 1 hour, and the three Jinla people produce a total of 15 pairs of shoes, which takes 3 hours, i.e. 180 minutes, so the time for each pair of shoes is: 180 15 = 12 minutes.

Method 3: The efficiency of producing shoes is 4 pairs of hours, 5 pairs of hours, and 6 pairs of hours.

So the efficiency is 5 pairs of hours, so it takes 12 minutes.

The answers above are: line 37 lines 3,12,12

Application: (5 questions).

1. Two classes of the fifth grade participated in the tree planting activity There were 37 people in one class, and a total of 132 trees were planted; There are 35 students in the second class, and a total of 120 trees are planted How many trees are planted in each class of the fifth grade? How many trees does the average 5th grader plant per person?

2. The Pioneer sailboat went to sea for 13 days in the first half of the month, catching a total of 805 tons; In the second half of the month, 14 days at sea, 64 tons of fish per day How many tons does this boat catch on average per day?

3. There are 22 boys in a class, with an average height of centimeters; There are 18 girls with an average height of centimeters What is the average height of the whole class in centimeters?

4. There are 10 grandmothers in the nursing home, with an average age; There are 12 grandfathers, and the average age is the average age of the elderly in the hospital (the number is kept to one decimal place).

5. A classroom is 8 meters long, 6 meters wide, and meters high, and the walls and ceilings of the classroom should be painted The area of doors, windows and blackboards is 22 square meters, and the average kilogram of paint per square meter is used.

Decimal division (20 ways): 1

The correct answer is as follows:

1, 512 process: x 35=, so x=, so x 2,, process: because, , 1, ,1, because 10, so one rope can cut 6 jump ropes, 15 ropes can cut 15 * 6 = 90 jump ropes.

2，a=16,b=9,c=24,d=6

Let these four bundles of pencils have a, b, c, and d branches.

From the meaning of the title: a+b+c+d=55, a-4=b+3=c2=2d, so a=2d+4, b=2d-3, c=4d

So a+b+c+d=2d+4+2d-3+4d+d=9d+1=55 so d=6, so a=16,b=9,c=24, if you don't understand, you can ask.

Divide by divide.

Divide by divide. Divide by divide.

Divide by divide. Divide by divide.

1. Two road repair teams jointly built a road, and team A repaired a kilometer, which is twice as much as team B. How many kilometers is the total length of this road?

2. The hourly Internet access fee is RMB. Do the math, how long does Xiao Ming's family spend an average day online every day in June?

Xiao Ming said: My family's Internet access fee in June is 180 yuan.

3. How many hamburgers can you buy for 50 yuan per hamburger?

50 = (pcs).

4. Xiao Ming received 1010 kg of sweet potatoes and prepared to transport them back in packaging bags, with a maximum of 45 kg per bag. How many bags do I need to prepare?

5. The school bought back a batch of sporting goods, bought 18 pairs of badminton rackets for yuan, and bought 25 pairs of table tennis rackets for yuan. How much more expensive is a badminton racket than a table tennis racket?

6. The toy factory plans to produce 1,200 remote-controlled cars, which have been produced for days, 80 per day, and the rest will be completed in 10 days, how many are produced per day on average?

(hours).

7. When the speed of the ostrich is kilometers and the speed of the African wild dog is 56 kilometers, how many hours does it take for the ostrich to run in hours? 【

1.= km).

2.180 30 hours).

3.50 = 4 (pieces) change 8 yuan.

4.1010 50 = 20 (pcs) more than 10 kg and then use a bag to share 21 (pcs).

5.-= (meta)6 （1200 - = 84

7.(hours).

1) km).

A: Two road repair teams work together to build kilometers of roads.

2) 180 hours).

Answer: Xiao Ming's family spent 75 hours on the Internet in June.

3) 50 pcs)....8 (yuan).

A: You can buy 4 hamburgers and have 8 yuan left.

4) 1010 45 22 (bag)....20 (kg), 22+1=23Answer: Xiao Ming needs 23 bags to finish.

5) Yuan) A: Each pair of badminton rackets is more expensive than table tennis rackets.

6) (1200 units).

A: The remaining 10 days produce an average of 84 vehicles per day?

7) (hours).

Answer: How many hours does it take for an African dingo to run?

1.= km).

2.(180 = hours).

3.50 = (pcs).

5.-= (meta)6 （1200 - = 84

7.(hours).

First calculate the total amount of fountain pens** 5 yuan * 5 = 25 yuan.

This gave 5 2=2 notebooks.

The total amount of the actual purchase of the notebook** 2 yuan * (10-2) = 16 yuan total ** 25 + 16 = 41 yuan.

Xiao Ming went to the store to buy pens and exercise books, known that each pen is 5 yuan, each exercise book is 2 yuan, and buy two pens and get a notebook for free, how much does it cost to buy 5 pens and 10 notebooks?