An Exercise: Math

I have purchased the SAT Official Guide by CollegeBoard. It's HUGE. I was carrying it to the library, and my 5min walk seemed to last FOR-E-VER. Instead of lugging the thing back and forth to school, I have torn out certain chapters and storing them in a folder. Right now I'm studying: Mathematics...WHOOPEE!

Mathematics is DEFINITELY a subject that you need CONSTANT practice on. After 1year of no math class, [my Korean class doesn't count...because it's not the same stuff* they cover on the SAT] I have forgotten, pretty much everything. In addition to the SAT Official, I also bought a math exercise book. After completing the first 5 worksheets, I tallied up my scores and I scored in the 500s...which is not too bad, considering that the average is somewhere in there, and I haven't had math for a year, but still.....I WANT HIGHER! I went through the worksheets again, and I scored in the low 700s that time...much better.

*This year in Korea, we have been studying matrices, logarithms, etc.

We are not required to know any of this for the SAT.



The Official SAT Study Guide: The Mathematics Section...Chapters 15~17

-Number and Operations Review

-Algebra and Functions Review
-Geometry and Measurement Review


I suck at factoring. I was really good at it in 8th

grade...back when college math was a piece of

cake. BUT! I have relearned how to do it, and am gradually becoming a little faster with each practice problem. [YAY!]

Here are a few things that I have reviewed:

Directly proportional: y=kx
Inversely proportional: y=k/x

Difference of two squares: a2 + b2 =(a+b)(a-b)
Difference of cubes [addition]: a3 + b3 = (a + b)(a2 – ab + b2)
Difference of cubes [subtraction]: a3 – b3 = (a – b)(a2 + ab + b2)

Quadratic Formula: -b+ √b2-4ac/2a