# Last-Minute SAT Math Study

I’ve spent this week rehearsing the ** Big SAT Math Ideas** with my students. Here’s a list of some of the most important.

Pass these last-minute refreshers along to any high-schooler you know taking the SAT on Saturday, May 1 (tomorrow!)

(And, take a look yourself and see how much *you* remember)

- An
**integer**is a whole number, including zero and the negatives. Fractions are not integers. Examples of integers: ….-3, -2, -1, 0, 1, 2, 3… **Figures on the SAT are drawn to scale unless they tell you otherwise**. You can assume that segments that look equal are equal, angles are drawn to scale, etc.- You get the
**arithmetic mean (average)**of a set of numbers by first adding the numbers together and then dividing that sum by however many numbers there were. - You get the
**median**of a set of numbers by first putting the numbers in order from least to greatest and then locating the middle number; that’s the median. If there are two number in the middle, take their average (arithmetic mean); that will be your median. - Often you can use the answer choices to plug into the question and test for which one works. This is called
**“back-solving.”**

- Many right triangle questions call for
**Pythagorean Theorem**(see photo). - Also remember
**Isosceles Triangle Theorem**: If two sides of a triangle are equal, the opposite angles are also equal (see photo). - The x and y axis are sometimes called the
**rectangular coordinate system**. - It’s often helpful to sketch the x and y axes and the lines or other figures in a coordinate geometry problem.

**Parallel lines have equal slopes.****Perpendicular lines**have slopes which are opposite reciprocals. One slope will be negative while the other is positive, and they are also reciprocals (see photo).- When a fraction is equal to another fraction (this is called
**a proportion**), the cross-products are equal. (see photo).

Good luck! You’ll do fine!

**APA Reference**

Cousins, L. (2010). Last-Minute SAT Math Study.

*Psych Central*. Retrieved on May 22, 2015, from http://blogs.psychcentral.com/always-learning/2010/04/last-minute-sat-math-study/