4 elementary school calculation questions, to write the column process, urgent.

Question 1: From the ratio of the first week to the rest is 1:9, we can know that the full length is divided into 10 parts, and the first week repairs 1 part, that is, the first week repairs the full length of 1 10, and the second week repairs the full length of 1 8, then the second week repairs the full length of 1 8-1 10 = 1 40 more than the first week, that is, the full length of 1 40 is a kilometer, then the full length is a kilometer.

The column equation is (1 8-1 10)*x=

Question 2: If the number of dance team is 3x, then the number of choir team is 5x, and the equation 5x-24=3x+24 is obtained, and x=24 is obtained, that is, there are 72 people in the dance team and 120 people in the choir.

Question 3: This question is similar to Question 2. If team A has 5x tons of cement, then team B has 3x tons of cement. (3x+28)-(5x-28)=10 to obtain x=23, that is, team A has 115 tons of cement, and team B has 69 tons of cement.

Question 4: Let this pile of fruits have x kilograms, 3 7*x+15=1 2*x to get x=210.

The first week repaired the full length: 1 (1 + 9) = 1 10 The second week repaired more than the first weekThe full length: 1 8-1 10 = 1 40 The total length: kilometers.

According to the title, the choir has 24 2 = 48 more people than the dance team.

Choir: 48 (5-3) 5=120 members.

According to the title, A is more than B: 28 2-10 = 46 tons.

A: 46 (5-3) 5 = 115 tons.

B: 115 3 5 = 69 tons.

Sell another 15 kilograms, and you sell all 1 (1 + 1) = 1 2 original: 15 (1 2-3 7) = 210 kilograms.

1.This section of the road is x kilometers long.

1 8x-1 10x= x=60 slightly.

2.The choir has x people.

5 8x-24=3 8x+24x=192 slightly.

Two piles of cement totaling x tons.

5/8x-28=3/8x+28-10

x = 184 A115 B 69

4.This pile of fruit was originally x kilograms.

3/7x+15=4/7x-15

x=210 slightly.

Two wheels roll over the same distance, wheel A turns 50 times, wheel B turns four-fifths of the number of turns of wheel A, wheel A has a circumference of centimeters less than wheel B, what is the diameter of each of these two wheels?

2. The circumference of a round flowerbed is meters, and now the circumference of the flowerbed is widened by 2 meters, and the circumference of the flowerbed is how many meters is now?

3. Draw the largest circle in a square, the area of the circle is square centimeters, how many square centimeters is the area of the square?

Question 1: Serial.

Bai Painting: Literature and Art Book = 1 4 : 1 6 = 3:

2 amp proportional distribution: du***: 1500 (3 + 2) * 3 = 900 literary and artistic books zhi:

1500 (3+2)*2=6002 Questions: The boys removed 1 8 are left.

There are 7 copies of dao, which is the same as the number of girls, so after 310-10=300, 8 boys and 7 girls are allowed, and they are distributed proportionally: boys: 300 (8+7)*8=160 girls: 300 (8+7)*7+10=150

1.Literature and art books account for the total:

1 4 Literature and art books are more than du*** total number of dao: 1 4-1 6 = 1 12

Total books: 1500 1 12 = 18000 books 2According to the thematic preference, there are 10 more girls than boys 1-1 8 = 7 8.

Boys: (310-10) (1+7 8)=160 and Girls: 310-160=150.

(1) Set up co-ownership.

baix Ben.

1/4x-1/6x=1500

x=18000

A: Books. There are a total of 18,000 picture books in the DU room.

2) Set up boys to have.

Daox people.

x-1/8x=310-x-10

x=160 310-160=150

A: There are 160 boys and 150 girls in the sixth grade.

1. Solution: Set up a total of x books with pictures.

Then du quarter x sixth x zhi1500 twelfth x 1500

x＝18000

A: There are a total of 18,000 books in the DAO Library.

2. Solution: There are male x people, tolerance.

There are girls (310 x) people.

x eighths x 310 x 10

Seven eighths x 300 x

Fifteen eighths x 300

x 160 so 310 x 150

A: There are 160 boys and 150 girls.

Let the total number be n, *** is 1 6n, and the literary book is 1 4n, 1 4n-1 6n=1500, n=18000

Let the number of males be n, 1 2(310-1 8n-10)=n-1 8n, n=160

One. Fill in the appropriate marks in parentheses.

2:15 = ( ) hours.

3 tons 40 kg = ( ) tons.

145 cm = ( m.

Two. The quotient of dividing the number A by the number B is the simplest integer ratio of the numbers A and B is (7:5).

Three. Three-fifths = (3) vs. (5) = (3) 5).

Four. For a job, A does it alone for 10 days and B does it for 15 days, the ratio of working time of A and B is (2:3), and the ratio of work efficiency is (3:2).

Five. A motorcycle consumes three-quarters of a kilogram of fuel per 48 kilometers and can travel (64) kilometers per kilogram of gasoline on average; It takes 1 km to travel fuel (kg).

Six. The number A is two-sevenths of the number B, and the ratio of the number B to the number A is (7:2).

Seven. Seven-two-fifths of a 6-kilometer is equal to three-fifths of a kilometer (20 7).

Eight. A rope is 6 meters long, the first time it is cut in half, the second time it is cut in half, and there is still ( m.

Nine. The ratio is three times smaller than the former term and three times larger than the second term, and the ratio is (9 times larger).

Ten. Number A 3/8 = Number B 3/4 (Neither A nor B is 0), Number A (1:2) Number B.

Eleven. The ratio of the sides of two squares is 1:3, and the ratio of their areas is (1:9).

Twelve. Two barrels of oil, pour one-seventh from a barrel of oil into barrel B, then the weight of the two barrels of oil is equal, the original ratio of the weight of the two barrels of oil is (4:3).

A baker's dozen. The number of male employees in a printing factory is seven times that of female employees, and the ratio of male to female employees in this factory is (7:2).

There is also a columnar calculation problem.

Three-tenths of the number A is equal to the number B, what is the ratio of the number A to the number B? If the number B is 6/7, what is the number A?

Let the number of armor be x, then it is equal to 3x 10

The ratio of number A to number B is x (3x 10) = 10:3

If number B is six-sevenths, number A is (3 10) * (6 7) = 20 7

7:5 3 5 3 5 2:3 64 4 7:

2 35 9 times larger than 1:9 4:3 7:

210:3 Twenty out of seven.

It's a little less, but for the sake of you're an elementary school student, I'll help you get a 4 at a time

II. 7:5 III. 3:5 3 divided by 5

4. 3:2 2:5

5. 60km 1 60

VI, 7:2, VII, 35

8. 3 2m

9. Increase by 9 times.

10. 2 times the number of A and B that is: the ratio of two numbers is 1 2

xi. 1:9

xii, 7:5

xiii. 7:2

1: 9/4 hours; 76/25 tonnes; 29/20 of a metres;

II:7:5;

three: 3:5, 3 divided by 5;

4:2:3, 3:2;

Five: 64 km, 1/64;

VI:7:2;

VII:35; VIII: 3/2 of a meter;

Nine: 9 times smaller;

10: (I don't know what to fill in the brackets, calculate A than B = 1:2) 11: 1:9;

xii, 7:5

xiii. 7:2

Columnar calculation questions: A * 3 tenths = B, A: B = 10:3; A * 3/10 = 6/7, A = 20/7

It's been a long time since I've done it. Tell me if it's wrong, I'll correct it).

1. 135 3040 2. 7:5 3. 3: 5 = 3 divided by 5 4. 2:

3 3:2 V. 64 Sixty-fourth (lowercase) VI. 7:2 VII. 35 VIII. 9. 9 times smaller than 11

9 xii, 7:5 xiii, 7:2

Number A multiplied by 3/10 = number B.

Number A: Number B = 10:3

A number multiplied by 3/10 = 6/7.

Number A = 20/7.

1.4/5 of a kilometer = 800 meters.

800*60%=480 meters.

3/10 km = 300 m.

480-300 = 180 meters.

2. Half of the total length is 50%, then 30% + 50% = 80% was repaired in the first 2 months, and the remaining 8 kilometers are 20% of the total length

So the total length is: 8 20% = 40 km.

The discount is 10% cheaper, and the difference between the two methods is equivalent to 5% + 10% = 15% = 30,000 yuan of the house price.

The house price is: 3 15% = 200,000.

All hands on... Remember to give points.

1.4 5*60%-3 10=9 50 km (or km).

2.The total length of the road is 8 (1-30%-50%) = 40 km.

3.The price of this commercial house is 3 (1+5%-90%) = 200,000 yuan.

1. Solution: 4 5x60%-3 10=12 25-3 10=24 50-15 50=km.

2. Solution: 8 (1-30%-1 2)=8 (1 5)=40 km.

2. Solution: 3 (1+5%-9 10)=3 (3 20)=200,000 yuan.

1.4 5 kilometers is 800 meters, 3/10 meters is 300 meters, 6/10 of 800 meters is 480 meters, and 300 meters have been dug, then 800 multiplied by 6/10 and subtracted 300 equals 18.

2.Half of the total length has been repaired, and there are still 8 kilometers that have not been repaired, which means that these 8 kilometers are the remaining 20 percent, so the total length of the road is 40 kilometers.

(1) How many members are there in the top 100 gymnastics team?

Total: (1+3+3 3) 3=39 (person).

2) If it takes 2 minutes to notify three people at the same time, how many team members can be notified in 4 minutes?

I can notify: 4 2 = 2 (times).

1+3) 3=12 (person).

3) How many minutes does it take to notify all team members of the story?

A total of three notifications, it takes 2 3 = 6 (minutes).

4) If the Young Pioneers of the Top 100 Primary Schools also designed the same contact method as above, how many Young Pioneers can be notified by the 8-minute brigade counselor?

8 minutes to give notice:

8 2 = 4 (times).

1+3+3 3+3 3 3) 3=120 (person).

The hypothetical method assumes that all are excellent awards: 60 6 = 360 yuan.

More: 360-260 = 100 yuan.

Winners: 100 (60-35) = 4 winners.

Excellence Award: 6-4 = 2 people.

Solution: There are x people for the Excellence Award and (6-x) for the Excellence Award.

60x+35(6-x）=260

60x+210-35x=260

25x=50

x=2 winners: 6-2=4 people.

A: There are 2 people who have won the Excellence Award and 4 people who have won the Excellence Award.

If the prize needs to buy the winning prize all: 35x6=210 (yuan) The difference between the actual and all the winning prizes is: 260-210=50 (yuan), which means that this 50 yuan is the difference between all the excellence awards and the winning awards.

One Excellence Award - One Winning Award = 60-35 = 25 (Yuan) Therefore, the number of Excellence Awards is: 50 25 = 2 (pieces), that is, the number of 2 winners: 6-2 = 4 (people).

A: There are 2 students who won the Excellence Award and 4 students who won the Excellence Award.

Have you ever studied equations? This way I can find a solution that works for you.

Question 1: 120 divided by 4 is the sum of the length of a set of edges, equal to 30, and then divide 30 by 2+1+3 is a number to find the length, width and height respectively, and finally find the volume.

Question 2: Divide by 1 20

Question 3: Inner angle and 180 degrees, right angle 90 degrees, 180-90 and 4-1 Question 4: 7/2 3+2, 3 is the morning, 2 is the afternoon.

1 Solution: 2+1+3=6 120 divided by 6=20 20 times 2=40 20 times 1=20 20 times 3=60

40 times 20 times 60 = 48000 Answer: --2 Solution multiplied by 20 + Answer---

3 Solution: 4+1=5 90 divided by 5=18 4-1=3 18 multiplied by 3=54 Answer---

4 Solution (seven-fifths multiplied by three-fifths) (sevenths multiplied by two-fifths).