After the passage states the main idea, the Main Idea will be elaborated or supported.
The author can Elaborate or Support the Main Idea in various ways including the following: Defining a Key Term, Providing Details, Offering Examples, Comparing a Related Idea, Quoting an Expert, etc.
Here is a problem explanation which shows that actual calculations aren't necessary as long as you understand the basic relationships of the problem. Here's the link: http://bit.ly/2z9Ctow
Sometimes you'll come across a passage so difficult or poorly written that you're confused way before you even reach the second paragraph. You may think that if you continue reading sooner or later the passage will begin to make sense. Unfortunately, what happens is that you become even more confused.
It's absolutely crucial that you come to grips with the main idea of a passage. Until you do, the details won't make much, if any, sense. WHAT TO DO?
Since the author frequently sums up his or her point in the last sentence or two of the passage, go directly to the last paragraph. By reading the last few lines carefully, you should get a much better grasp of the author's main idea. Once you've gotten a handle on the main idea, return to the first paragraph and proceed with the rest of the passage. Now the text should make a lot more sense.
The PREFACE often contains information that can give you clues as to what the Main Idea will be. It can also have information that will help you come up with some correct answers.
What's the Main Idea? Sum up the entire passage in 1-2 sentences.
Why Was the Passage Written? What is the purpose of the passage? To inform? To Entertain? To Explain? To Prove Something?
What's the Tone? Not what was said, but how it was said. Concerned? Explanatory? Expose? Informative?, etc.
By asking yourself these questions, you'll be oriented in the right directions when you begin to look for information you need to come up with the correct answers to the questions.
Get to the questions as quickly as possible! Why? Because the questions will determine what parts of the passage are important. You may be struggling mightily to try to understand a particular concept when in fact there will be NO questions regarding that. You have just wasted some valuable time!
SAT Reading Passages: To underline or not to underline? Many students feel that they need to underline every little fact and statement in a passage and understand every concept mentioned. That is not a very good idea and the reason is that a person’s working memory can only retain three or four items at once. When you are underlining nearly everything and trying to understand everything, your working memory becomes overloaded and critical thinking is severely impacted. It pays to keep underlining to a minimum and we’ll look at reasons why tomorrow.
Many people believe that the SAT is an IQ test and that it cannot be studied for. Wrong on both counts! The SAT is a standardized test and can be studied and prepared for quite easily! Here is a 14-minute video by Mike Barrett, a noted SAT tutor, that puts the SAT in the right perspective. "GET YOUR HEAD, RIGHT".