##### Praxis Core 2023-2024 For Dummies

Explore Book## General tips for succeeding on the Praxis

- Be sure to eat something before the test, no matter how nervous you are. Even if you don’t feel hungry before the test, hunger pangs have a way of sneaking up on you the moment the test starts. If you’re too jittery to choke down your customary bacon and eggs, have some bananas on hand, as they make for a good, filling breakfast that’s easy on a nervous stomach. And during the test, they’ll keep your blood sugar from dropping, so you’ll stay alert.
- The answer to the “coffee or no coffee” is “do whatever you normally do.” If you’re a daily coffee-drinker, there’s no need to go without your java on test day. But if you don’t typically drink coffee, suddenly pounding one before the test is more likely to shake you up than improve your performance.
- “Get a good night’s sleep” is always good advice, but it’s important not to psych yourself out by feeling compelled to alter your sleep schedule. If you normally go to bed at 11, the only thing crawling into bed at 8 will accomplish is you getting angry at yourself for not falling asleep fast enough. Once again, “do what you normally do” is the best advice.
- Remember that, unlike on some other standardized tests, there’s no penalty for a wrong guess on the Praxis, so there’s never any reason to leave a question blank.
- When a question gives you trouble, eliminating wrong answer choices one by one is more productive than hoping that the right answer will jump out at you.

## Math vocabulary and rules for the Praxis

requires knowledge of many word meanings and rules. These are some of the major word definitions and rules you need to know:- A
*factor*of a number goes into it a whole number of times; a number is multiplied by a whole number to get a*multiple*of itself. - To convert a decimal number to a percent, move the decimal two places to the right and add a percent sign (%); to convert a percent to a decimal number, drop the percent sign and move the decimal two places to the left.
- To multiply a variable to any power by the same variable to any power, give the variable an exponent that is the sum of the exponents involved in the multiplying.
*Like terms*have exactly the same variables with exactly the same exponents for each. Only like terms can be combined.- To solve an equation or inequality, get the variable by itself on one side by doing the opposite of everything that is being done to it to both entire sides.
- You must change the direction of an inequality sign if you multiply or divide both sides by a negative or if you switch the sides.
- Vertical angles are congruent.
*Supplementary angles*have measures with a sum of 180°.*Complementary angles*have measures with a sum of 90°.- Angles that form a linear pair are supplementary.
- The sum of the interior angles of a triangle is 180°. The sum of the interior angles of a quadrilateral is 360°.
- Similar polygons have the same shape but not necessarily the same size. Their corresponding side measures are in proportion, which means that they have the same ratio in every case.
- The sum of the squares of the leg measures of a right triangle is equal to the square of the hypotenuse measure.
- The
*mean*of a set of data is the average, the*median*is the middle number or the mean of the two middle numbers when the numbers are in order, and the*mode*is the number that appears the most. - The
*probability*of an event is the number of qualifying outcomes divided by the number of possible outcomes. - A number expressed in
*scientific notation*is a single digit followed by a decimal and the digits that come after the decimal multiplied by 10 with an exponent.