There are two math problems in the 6th grade, and the correct answers will be scored

1. Set up a winter camp for x people, and for social practice y people, there are.

6/11x=7/13y

1/7x+4=1/6y

The solution is x=154 y=156

2. Set the white rabbit x and the black rabbit y.

1/3x+1/4y=43

1/4x+1/3y=41

The solution is x=84 y=60

1.Untie; The number of people in the winter camp is x the number of people participating in social practice is y; 6\11x=7\13y...

1\7x+4=1\6y...

Solution; x=154 y=156

2。Let white be x and black be y. then x 3 + y 4 = 43 and x 4 + y 3 = 41. Get: x=84, y=60.

1)1x=7/13...1) Set the participation in the winter camp as: x7x+4=1 6y....2) Participate in community practice activities: ySolution: x=154 y=156

2) Set the white rabbit x, the black rabbit y 1 3x+1 4y=431 4x+1 3y=41

Solution: x=84 y=60 goodbye!

1.Set up x people to participate in the winter camp and y people to participate in community activities. Then 6x 11 = 7y 13, x 7 = y 6-4The solution is x=154 y=156

2。Let white be x and black be y. then x 3 + y 4 = 43 and x 4 + y 3 = 41. Get: x=84, y=60.

Set up unknowns. Make a list of equations.

Solving. The topic is not difficult, use your own brain)

Wrong. You list the conditions in the question one by one according to the volume formula of the cuboid and the meaning of the question, and it is very clear that the length and width can be found, and the height is also given, so that the volume can be found.

Of course it's wrong, the first point of mistake is that your equation is not written with a description, and the second point is that the second step is divided by 6 in 6 is **.

The width of the box: 120 5 8 = 3cm

The width is reduced by 3cm, and the width of the cuboid is 3cm, so 288 cubic centimeters is the volume of the cuboid.

An object moves 2 meters 0 to the south

Second. 400g to 402g 400 402

100000000 100 1 = 1000000 (cm) = 10000 meters.

1300000000×1÷100×1=13000000cm=130000m

1.-3 hours.

2.An object moves 2 meters 0 to the south

3.Second. g 398g 402g.

100 million is a million times of 100 sheets of paper, 100 million pieces of paper are 1 centimeter, 100 million pieces of paper have: 1 * 1000000 = 1000000 centimeters.

1.3 billion is 13 times that of 100 million, so if the average person of 1.3 billion in China wastes about one piece of paper per day, then these papers are stacked approximately: 1000000 * 13 = 13000000 cm.

Question 1: -9; Question 2: Move 2 meters to the south, 0;Question 3:

Second. Question 4: 400g 402g, 400g, 402g; Question 5: 100 million out of 100 million, 100 sheets of paper are 1 centimeter thick, 100 million sheets of paper are 1 million centimeters thick = 10,000 meters; With a population of 1.3 billion people, if the average person wastes about one piece of paper per day, then these papers are stacked up to about 130 kilometers.

Question 1: -3

Question 2: Move 2 meters to the south +0 or -0

Question 3: B.

Question 4: 400g 398g 402g

Question 5: 10,000 meters 130 kilometers.

100 sheets of paper 1 centimeter, that 10,000 sheets of paper is 1 meter, 100 million is 10,000 times 10,000, so 100 million pieces of paper.

10,000 meters thick. The height of 1.3 billion sheets of paper is 13 times that of 10,000 meters, which is 130,000 meters, or 130 kilometers.

One -9 Two Movement to the South Two Meters 0 Three B Four 400g 398g 402g Five 100 million divided by one is the first question 1.3 billion divided by one.

-3 hours. Move two meters to the south 0 meters.

Second. You must not have made this question clear, it should be 400 398 402100000000 100*1=1000000cm=10000m13000000000 100*1 100=130000m

+9 2 m south 0 B 400 400 402 1000000 130000 m I started by multiplying 1.3 billion people by 1 centimeter to get the number of meters.

1. The second day is more than the first day, so the total length is 200

2. When four minutes meet, the sum of the velocities of A and B is 1842 4 = meters per minute, so the speed of B is meters per minute.

1.The engineering team repaired 1 4 of the whole field on the first day of the road, and repaired the full length on the second day, and it is known that the second day was 200 meters longer than the first day, how many meters is the total length of this road?

1600 meters.

2 A road is 1842 meters long, A and B go in the opposite direction from both ends at the same time, A walks 350 meters per minute, B walks, meets in four minutes, ask B to walk every minute? Rice.

m ps : The answer to the second question of icefai is incorrect, and the landlord is cautious.

1.The next day it was repaired, which is 3 8So the whole process is:

200 (3 8-1 4) = 1600 meters.

2。The speed of two people and the speed minus A is the speed of B.

1842 4-350 = m min.

1. Let the road length be m, then, m=1600

2. Let the speed of B x m min, then 350 * 4 + 4x = 1842, get x = m min

Day 1: 1 4 = 25%.

And because the second day was 200 meters more than the first day.

So the full length is.

200 (m.)