GRE Math Rules
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11 terms
Terms | Definitions |
|---|---|
 First 10 Prime numbers | 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 with 2 being the only even prime |
| Multiplying fractions | multiply straight across |
| dividing fractions | To divide fractions, invert the second one and multiply |
| How to find the percent increase/decrease | Percent Change= Difference/Original x 100 |
| exponent rules | Adding an exponent to a fraction always results in a smaller number, a negative number raised to an even power becomes positive, but a negative number raised to an odd number remains negative |
| square root | a number which when multiplied by itself gives the original number |
| multiply and divide square roots | the same as any other number |
| adding and subtracting square roots | you can not add or subtract square roots unless the roots are the same. |
| common square roots | 1= 1 2= 1.4 3= 1.7 4= 2 |
| associative law | When you are adding or multiplying a series of numbers, you can regroup he numbers in any way you would like |
| distributive law | a(b+c)=ab+ac |
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