Expressions

1. a property which states that changing the order of an addition or multiplication problem does not change the value
2. a numerical value which tells how many times a base is used as a factor
6. the type of expression containing no variables
8. expressing a number as a product of prime factors
10. a property which states multiplying a sum or difference is the same as multiplying each number in the sum or difference then adding or subtracting
12. a type of expression that contains at least one variable
13. a property which states that adding zero to a value or multiplying by one does not change the value of that number

1. the number attached to a variable that means multiply
3. a property which states that changing the grouping of numbers in an addition or multiplication problem does not change the value
4. a property which states that adding the opposite to a value or multiplying by a reciprocal gives a value of zero or one
5. parts of an expression separated by addition and subtraction signs
7. a specific number whose value does not change
9. a letter that represents an unknown value
11. to substitute a value for a variable to simplify