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SAT Prep


Math SAT- Basic Algebra

Math SAT Preparation – Basic Algebra

Welcome to a Math SAT Preparation Lesson. In this lesson we will go over really simple, basic algebraic and numerical concepts.

First of all, make sure you remember your basic grade 1 math:

Numbers – these are the symbols we use to do math. For example, 3, -289, 0, five. Operations- these represent actions you can perform with your numbers. The basic operations are:

a. Addition: for example, 1+2=3

b. Multiplication: for example, 2 * 3=6

There are other minor variations of these operations:

c. Subtraction, adding a negative: 5+(-2)=5-2=3

d. Division, multiplying by an inverse: 4 * (\frac{1}{2})=\frac{4}{2}=2.

Division also involves quotients and remainders. Every number a can be divided by some smaller number b in such a way that a=bq+r, where q is your quotient and r is your remainder. For example, when 19 is divided by 6, the quotient is 3 since 6 goes into 19 3 times, while the remainder is then 1.

Thus, we write: 19=6 * (3)+(1).


Addition and multiplication have some nice properties – they are commutative, associative and distributive. This means that, for addition:
a+b=b+a, (a+b) + c=a+(b+c) and a * (b+c)=(a * b)+ (a * c)


There are special types of numbers we have to consider:

a. Negative numbers – all numbers less than 0, such as -7

b. Even numbers – numbers divisible by 2, such as 166712

c. Odd numbers – numbers not divisible by 2, such as 5

d. Prime numbers – numbers divisible only by 1 and themselves, such as 2,3 and 5.


We should also recall fractions, which are division that aren’t clean and don’t represent whole numbers, such as:

\frac{2}{3}

Fractions can be represented as decimal numbers, for example:

\frac{1}{2}=0.5.

An additional concept is the percentages. These are fractions that are always over 100. For example, 20% of the number 15 is equal to:

20 * (\frac{15}{100})=3.


Good stuff so far.

Another important tool in algebra is a variable. Variables are usually represented by letters (most often x), and they denote an unknown number.

Variables are highly useful in equivalence relations, or any expression that uses an “=” sign. For example:

5x+10=20

Which can be solved for x to find that x=2.

We can have expressions with multiple variables, such as:

2x+y=6, x-y=3.

The answer is x=3 and y=0 in this case, which can be denoted as (3 , 0).

Equations that use degree one variables, such as the one we saw earlier, are called linear equations, as they represent lines in the classic 2-D XY plane. Equivalence relations do not have to be linear, however, and raising the degree of our variables is possible.

For example, the equation x^2=4 has solutions x=+/-2.


Higher degrees, called exponents, have exponent rules:

a. (x ^ a) * (x ^ b)=x ^ {a+b}

b. \frac{x ^ a}{x ^ b}=x ^ {a-b}

c. (x ^ 0)= 1

d. (x ^ a) ^ b=x ^ {a * b}

e.  x ^ {\frac{1}{a}}=\sqrt[a]{x}


Word problems are something to watch out for.

These problems usually define a situation which requires you to define your own equivalence relations. For example:

If Lucy has 5 apples more than Jack, we can say that if L represent Lucy’s apples and J represent Jack’s, then L=J+5. Once equations are set up, they can be solved to reach a solution.

These are all basic topics you should be aware of and comfortable with from your math classes. Here are a few notes and tips on how to deal with questions involving such topics when writing your SATs:

  • 1. These questions seem really easy, which may cause you to feel over-confident and thus make small, silly mistakes. Remember to take it slow and think through your answer.
  • 2. Watch out for the minus signs.
  • 3. Calculators are allowed, so use them well. Always be familiar and comfortable with your calculator.
  • 4. When solving equations, remember that you can check your answers by plugging them into the variables.
  • 5. Word problems can get tricky. Don’t forget to define your variables clearly and set up the relationships correctly before solving the equations.

Feel ready?

Think you’ve mastered your basic algebra? Try the basic algebra test.

For a lot more algebra, check out the Welcome to Algebra Series in the Algebra community:

Part I

Part II

Part III

Part IV

geof
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geof said:

Oren, Is the SAT administered in Canada? Also, in strategy 1. near the end, “Remember to take it slow and think through your answer.” One stratgey I tell my student is the one of triage, that is, go through the questions fairly quickly and if you think you can anser it quickly do so; make note of the ones you passed over, and make a second or third cycle through the unanswered ones.

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  • Posted 3 months ago.
oLahav
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oLahav said:

The SAT is administered all over the world. However, it is only required for admissions into schools in the US, Canadian universities do not require it (is that a good or bad thing? Up to you to judge).

Personally, I think that leaving questions you’re unsure of until you’ve gone through the test once is a good idea, especially in multiple choice tests like the SATs where you can just guess those questions you don’t know and still have a 20% chance of getting them right. On the other hand, going quickly through the questions does often lead to situations when you make a small mistake, like miss a minus sign, and you’re unaware of it, so you’re still confident your answer is right and you’re not likely to change it even if you check your answers. My suggestion is to leave questions that you know you don’t know to the end, but take some time to ensure that when answering those questions you’re sure of, you get them right.

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  • Posted 3 months ago.
geof
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geof said:

I don’t recall having to take an entrance exam when I went to Queen’s. I did have to have pretty good marks though. Having mentored high school students for four years now in the US, I think the SAT & ACT are good. If you’re good at either one, it means you know basic things well and it also means that you can strategize. I knew nothing about strategizing at that age.

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  • Posted 3 months ago.
arjun7391
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arjun7391 said:

keep up da gud work dude>>.

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  • Posted 2 months ago.
karan7391
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karan7391 said:

ur genius

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  • Posted 2 months ago.
pks
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pks said:

well its fine …....a review of basic maths

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  • Posted 2 months ago.
rohan3220
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rohan3220 said:

hey guyz plz help me,,actually i want to study undergraduate course in usa..can u tell me what exams i have to give for scholarship,plz guyz help me and also tell what i have to do if i go there to do mba?

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  • Posted about 1 month ago.
oLahav
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oLahav said in response to:
rohan3220
rohan3220’s post:
Citation Body

hey guyz plz help me,,actually i want to study undergraduate course in usa..can u tell me what exams i have to give for scholarship,plz guyz help me and also tell what i have to do if i go there to do mba?

To study in the USA you will need to take the SAT and the TOEFL. Join the Study in the US Community to learn more about the process. For scholarship information, you can join the scholarship community.

To get an MBA later on you will need to take the GMAT test.

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  • Posted about 1 month ago.
bushra adeeb
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bushra adeeb said:

I would like to study in the us and I am taking the SAT..but is it necessary for me to take the TOEFL too..I am from India so English would be a foreign language..but i speak it at home and am fluent…??

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  • Posted 27 days ago.
oLahav
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oLahav said in response to:
bushra adeeb
bushra adeeb’s post:
Citation Body

I would like to study in the us and I am taking the SAT..but is it necessary for me to take the TOEFL too..I am from India so English would be a foreign language..but i speak it at home and am fluent…??

While not every US school would require the TOEFL and some would accept the SAT writing section as replacement for the TOEFL, other schools will require it. If you studied in an English institute for at least 2 years, the TOEFL may be waved by most colleges.
I would advice you to take the TOEFL anyway, just to make sure you satisfy the conditions of as many colleges as possible. If you’re fluent in English it shouldn’t be a problem, most people find the TOEFL easier than the SAT.

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  • Posted 27 days ago.
akashi
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akashi said:

beleive in doing not in saying

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  • Posted 22 days ago.
parshad
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parshad said:

i want to take admission in B.E. after 12th sci. in america. Is SAT exam is required 4 that? plz help me

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  • Posted 14 days ago.
oLahav
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oLahav said in response to:
parshad
parshad’s post:
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i want to take admission in B.E. after 12th sci. in america. Is SAT exam is required 4 that? plz help me

Yes, the SATs are generally required for pretty much all Bachelor degree programs in the US. I would advise you to make sure by checking on the specific college or university you are interested in, but I believe that chances are you’ll need an SAT score, and possibly a TOEFL score as well.

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  • Posted 13 days ago.
raunak
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raunak said in response to:
geof
geof’s post:
Citation Body

Oren, Is the SAT administered in Canada? Also, in strategy 1. near the end, “Remember to take it slow and think through your answer.” One stratgey I tell my student is the one of triage, that is, go through the questions fairly quickly and if you think you can anser it quickly do so; make note of the ones you passed over, and make a second or third cycle through the unanswered ones.

me a juniour college student who is now in std 11th. i want to do engineering in US. i was told by someone that for applying to universities in US I have to give SAT. but i don’t have any clue about this SAT can you help me with what i should do and how i should go about this? yours’ raunak ajmani

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  • Posted 5 days ago.
acrosstheuniverse
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acrosstheuniverse said in response to:
raunak
raunak’s post:
Citation Body

me a juniour college student who is now in std 11th. i want to do engineering in US. i was told by someone that for applying to universities in US I have to give SAT. but i don’t have any clue about this SAT can you help me with what i should do and how i should go about this? yours’ raunak ajmani

1. Set a Dated Goal for when you’d like to write the SAT.

  • This gives you a clear indication of when you’ll need to be prepared for
  • It’s a visual indicator, and something to strive for and plan around

2. Create a Study Schedule

  • My best advice would be to integrate practice exercises that help you master all three sections.
  • Utilize the SAT Question Bank as it is a great resource to practice all forms of questions other than the essay
  • Write Sample Essays with exercises such as Essay Inspiration
  • Set a time, place, break times and what you’ll cover to keep yourself on track.

3. Know the Concepts

4. Practice Makes Perfect

  • Whether you’re actively participating in the SAT Question Bank or doing Tests keep an eye on your time (the timer feature works wonders for this!!)
  • Pacing and budgeting your time for each question is crucial
  • 2 minutes per question should be sufficient
  • Passage-based and essays will take a bit longer (10 minutes for a passage based Q since it involves around 5 questions based on one paragraph)

5. Relax, sleep and absorb

  • Don’t overexert your brain
  • Taking breaks and sleeping the full amount lets your body absorb what you’ve practiced and learned
  • Don’t cram your studying, the longer you pace yourself, the more you’ll retain

6. Consult Others

  • Use the SAT Discussions to connect with others just like you
  • You have the ability to form study sessions and question forums right on LearnHub in these forums, so make use of the tools given
  • Students just like you are creating amazing resources which both improves and enhances their own skills and learning ability as well as gives you more resources to review
  • Teach one another!! To teach someone a concept, means you must know it 10 times better in order to explain such things to someone else. Feel free to post lessons, tests, questions, debates and discussions.

Hope this helps get you on your way to SAT Success!!

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  • Your comment will be modifiable for 10 minutes after posted.

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