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Arithmetic
math review
| Question | Answer |
|---|---|
| Even # | Are divisible by 2 |
| Odd # | are not divisible by 2 and ALWAYS have a remainder |
| Digits | there are 10 digits, in which you can make any # out of |
| Prime # | #'s only divisible by itself and 1 |
| Absolute value | distance between 0 and that # (always positive) |
| Variables/Coefficient | letters in a equation, the coefficient are the #(s) next to a letter |
| # divisible by 2 | any even # is divisible by 2 |
| # divisible by 3 | sum of digits can be divisible by 3, then it is divisible by 3 |
| # divisible by 4 | if the tens and ones digits are divisible by 4 |
| #divisible by 5 | last digit is either a 5 or a 0 |
| divisible by 6 | last digits are factors of 6 (2&3) |
| divisible by 8 | if the last 3 digits are divisible by 8 |
| divisible by 9 | if the last digits add up to 9 then it is divisible by 9 |
| = | equals sign |
| ≠ | slash in between the equals sign--> inequality |
| > | greater than |
| less than | |
| ≥ | greater than or equal to |
| ≤ | less than or equal to |
| ( ) | parenthesis--> calculate whats inside those parenthesis first |
| [ ] | brackets --> calculate whats in the brackets first |
| + | plus sign meaning addition between to numbers or terms |
| ± | calculate both plus and minus operation |
| minus-plus (doesnt exist) | calculate both minus and plus operation |
| * | multiplication |
| x | times sign meaning multiplication |
| • | meaning multiplication |
| ÷ | means to divide |
| / | means to divide |
| exponents | multiplying a number by itself by a # of times |
| multiplying exponents | add the exponents |
| dividing exponents | subtract exponents |
| negative exponents | reciprocal of that exponent |
| fractional powers | #above the line is most like a real exponent 9 1/2 the two would become the radical of 9 |
| power to a power | multiply exponents |
| zero power | always equal 1 |
| first power | always equals that number |
Created by:
13yesca1
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