What to do if you can t do a math problem, and what to do if you can t do a math problem

The first thing to determine is that the distance between A and B is a fixed number.

The travel time is the same, the distance is proportional to the speed, then the 27 kilometers more traveled by the passenger car than the truck is the one-fifth of the time when the speed of the truck is less than the speed of the passenger car.

27, which is the distance of one hour more travel for a passenger car than a truck, that is, one-fifth.

6 1 5 30km, this is the speed of the bus, then the distance of the bus is 30.

The distance by truck is 135 4 5 108 km.

The distance between A and B remains the same, and buses and trucks meet after a certain period of time.

The distance between the two places is 135 108 243km.

A: A and B are 243 kilometers apart.

Trucks: Passenger cars = 4:5

Per serving: 27 (5-4) = 27 (km).

The distance between a and b is 27x(4+5)=243 (km).

Passenger car speed = x truck speed = y

A1: Define the ratio:

x = 5 y = 4

1 of x 5 open hours = 27km

x = 30

y = 24

30+24)* = 243km

A2: The difference between x and y is 27 km

27/(5-4) *5+4) = 243km

Summary. What's the problem.

What's the problem.

Is there a title? Can you take a picture of the title?

This question examines the addition of the rigid ascending single door 56 This question has a problem 3 + 5 + 8 = 16, and the net 8 is determined. 5-1-2 = 2, then the second plus = 25 The second plus number of Bai Nian is 9 on the top of the day, but there is a return. It is impossible for this to happen Zheng Pei.

All right. Uh-huh.

Take a look. There are.

First of all, you should give the class to the preview side, find one to three questions to test your preview effect today, if you can do it means that your preview effect is good, no, don't be frustrated, listen to the teacher well, see where you don't understand.

First of all, you should use the definitions, theorems, properties and other related knowledge in the textbook to reach the level of understanding, memorization, and memorization, and first familiarize yourself with the use of it by doing post-class questions. Doing math problems is not just a sea of questions tactics to consolidate knowledge, so that some things get twice the result with half the effort, you can find some classic question types, synthesize, review before the exam, and there will always be unexpected gains during the exam. Here's the problem:

Can you keep doing it?

What about math problems that I can't do?

The time it takes for a boat to sail 90 km downstream is equal to 60 km against the current, and the equation is if the current speed is 2 km.

Ask, if you can't ask, you can check, if you can't find out, guess, it's best not to be empty, if you take the big test, you have to be blinded.

The brain finds a way to do its own thing.

I used to be like you, worried about this matter, since it doesn't work, you can go to Jingyou.com, not just copy the answers, learning methods are very important. May you remember.

Ask a tutor if you don't have the money to salad.

It's not a problem!