Solve the math problems with the masters! Hurry, hurry! Primary 6 math problems .

Because the total amount of money spent is an integer, the student who takes the train must be an integer multiple of 5 (multiply by an integer multiple of 5 to make the result an integer).

In addition, the minimum fare for students who consider taking the minibus and subway is 4 yuan per person (whichever is the lowest fare), and the total cost is 110 yuan, so the number of students who take the tram may be between 35 and 40.

According to the title, it can be inferred.

35 students by train (42 yuan).

11 students took the minibus (cost 44 yuan).

Take the subway for 4 students (cost 24 yuan).

So choose B

Since the total amount of money spent is an integer, the student who takes the train must be an integer multiple of 5 (multiplied by an integer multiple of 5 to result in an integer).

In addition, the minimum fare for students who take the minibus and subway is also 4 yuan per person (whichever is the minimum), and the total cost is 110, so the number of students who take the tram may be between 35 and 40.

It can be inferred from the meaning of the title.

35 students by train (42 yuan).

11 students took the minibus (cost 44 yuan).

Take the subway for 4 students (cost 24 yuan).

Your topic seems to be out of the ordinary.

Pick B: Have you ever studied a system of binary equations?

This is a multiple-choice question, you can't calculate it from the front, so use reverse thinking, bring the numbers in the options in, I'll give you an example: for example, a is 10 people, then you bring it in, then it is 10 people by minibus, and it costs a total of 40 yuan, then, the tram is x people, subway y people, x+y=40 (50-10 to get), get), and then you calculate, and find that x is not an integer, since it is a number of people, it must be an integer, so that after bringing in the calculation, only b is in line, Calculate that it is x=35 and y=5

Those who give a 10 on the top, do you have a conscience? Mistaken children!

There are x people on the train, Y people on the minibus, and Z on the subway.

x+y+z=50

Then put 10, 11, and 12 generations into y, and you can find it. Pick B

35 students by train (42 yuan).

11 students took the minibus (cost 44 yuan).

Take the subway for 4 students (cost 24 yuan).

1: There are x days of sunny days, and there are 6-x days of rainy days.

100x+（6—x）*60=520

x=4, there are 4 sunny days and 2 rainy days.

2: AB The two places are x kilometers apart.

x—2/5x—168）：（2/5x+168）=1：43/5x—168）*4=2/5x+168

2x=5*168

x = 420, ab and the two places are 420 km apart.

A: There are 4 sunny days and 2 rainy days.

2. On the second day, the total length of 2 5 1 4 = 1 10168 1 4 = 42 kilometers was repaired.

420 km.

A: AB and the two places are 420 kilometers apart.

1. Solution: If 6 days are sunny, then 6 days can be repaired:

100 meters 6 = 600 meters.

The actual repair is 520 meters, so the number of rainy days is:

2 days. The number of sunny days is:

6-2 = 4 days.

If there are x sunny days, then the rainy days are 6-x days.

100x+60（6-x）=520

100x+360-60x=520

100x-60x=520-360

40x=160x=4

There are 4 sunny days and 2 rainy days.

Assuming that all six days are sunny, then 100 6 = 600 meters, minus the actual number of meters, divided by the difference in efficiency, is the number of rainy days.

600-520) m (100-60) m = 2 days.

2) Let the full length be x.

x-2/5x-168=（2/5x+168）÷4x=420

1. 287*(1+1/7)-287

41 tons. tons of 3 3200*(1+1/4)

4000 pcs.

4.Pour out the weight of water = 15-6 = 9 kg.

2 3 of the total water weight

So the total water weight = 9 (2 3) = kg.

5 The area of the sector = 1 4 * square centimeters.

Triangle area = 20 * 20 2 = 200 square centimeters so shaded part = 314-200 = 114 square centimeters hope it can help you, thank you.

*1 7 = 41 (tons), analysis: "increase over May" is (June production, May production-1).

(1 + 3 20) = 10,000 tons), analysis: "overproduction than planned" is (actual plan - 1) = 3 20.

(1+1 4)=4000, analysis: "1 4 more than the original plan" is (actual plan-1)=1 4.

4. (15-6) (2 3) =, Analysis: 2 3 water poured out weighs (15-6) kg.

5. Analysis: Sector Area - Triangular Area.

ps: Kid, I helped you do your homework, I hope you understand my analysis well

1.The output of a pesticide factory in June increased by one-seventh compared with the output in May, and it is known that 287 tons of pesticides were produced in May, and how many tons of pesticides were produced in May compared with June?

287 (1 1 7) 278 41 tons.

2.Nanyang Village plans to produce 300,000 tons of grain this year, but the actual output is three-twenties more than planned.

30 (1 3 200) tons [this year's production].

3.A workshop plans to process 3,200 parts, due to the improvement of work efficiency, the result is a quarter more than the original plan, how many parts are actually produced in this workshop?

3200 (1 1 4) 4000pcs.

4.A bucket full of water weighs 15 kilograms, and after pouring out two-thirds of the water, it weighs 6 kilograms, how many kilograms of water can this bucket hold?

15 6 9 kg [poured out water] is 2 3 of all water

9 2 kg [1 3 of all water] all water

5.Find the area of the shaded part in Figure 1.

1／4 －20×20÷2＝114m2

Question 1 287 7 = 41 tons.

Question 2: 30 * (1 + 3 20) = 10,000 tons.

Question 3 3200 * (1 + 1 4) = 4000 Question 4 (15-6) (2 3) = kg.

Question 5 *20 squared 4-20*20 2=