# Pre-Algebra ch.1/smothers

## Terms

undefined, object

copy deck

- what is the absolute value: l-7l
- 7
- true or false: 5-5 is a numerical expression?
- true
- define: variable
- A letter that stands for a number
- simplify: 4+15divided by3
- 9
- (-)-(-)=
- (-) + (+)= answer varies
- (+) x (+)=
- +
- absolute value
- -l-102l
- (-)+(-)=
- -
- what is the order of operations?
- multiply and divide first and then add and subtract.(pemdas-please excuse my dear aunt sally)
- (+)+(+)=
- +
- define:evaluate
- a variable expression, you first replace each variable with a number.
- true or false: c-5 is a numerical expression?
- false it a variable expression
- (-)+(+)=
- depends on the numbers.......if the positive is bigger than the negative than the answer is postive but if the negative is bigger than the positive then it's negative.
- (+) x (-)=
- +
- define: Variable expression
- A mathmatical phrase that uses variables, numerals, and operation symbols
- simplify: 4y-15=? y=9
- 21
- define: intergers
- the whole numbers and their opposites.