| A | B |
|---|
| numerical expression | contains a combination of numbers and operations |
| evaluate | you find its numerical value |
| order of operations | rules to follow when evaluating an expression with more than one operation |
| algebra | a branch of mathematics that uses symbols |
| variable | a letter or symbol used to represent an unknown value |
| algebraic expression | Ex. 5m+6 |
| substitution property of equality | symbols: if a=b, then a may be replaced by b |
| communitive property of addition | Symbol - a+b = b+a; ex- 6+9=9+6 |
| Communitive property of multiplication | a*b=b*a; ex - 5*4=4*5 |
| Associative property of addition | (a+b)+c = a+(b+c); ex. (4+3)+9 = 4+(3+9) |
| Associative property of multiplication | (a*b)*c = a*(b*c); ex. (3*5)*7 = 3*(5*7) |
| counterexample | an example that shows a conjecture is not true |
| simplify | perform all possible operations |
| Additive Identity | a + 0 = 0+a = a ; ex. 5+0=5 |
| Multiplicative Identity | a*1=a ex. 3*1=3 |
| Multiplicative Property of Zero | a*0=0 ex. 7*0=0 |
| product | multiply |
| sum | add |
