Informal Algebra Vocab Test 1

5. The number one is neither prime nor composite. It is called the __________.
6. A combination of numbers, operators, grouping symbols, and variables which can be evaluated or simplified.
7. A number which has more than two factors.
8. A set with a never ending number of elements.
9. An example that proves a statement false.
13. The smallest positive integer that is divisible by two numbers.
16. The number used as a factor in an exponential expression.
18. Every member of a set is also a member of a larger or equal set.
19. A set with a countable number of elements.
22. A symbol, usually a letter, used to represent an unknown.
24. A quantity whose value does NOT change.
26. The greatest factor that divides evenly into two numbers.
27. Under a given operation if the outcome of the operation on any two members of the set is also a member of the set.

1. Parts of an expression separated by a + or −.
2. When you are multiplying like bases you will ____ the exponents.
3. A collection of objects
4. A number which has only two factors, 1 and itself.
5. The set of all elements which are in both sets A and B.
9. The numeric factor of a product which includes a variable.
10. Distance a number is from zero
11. A set of rules for simplifying expressions.
12. Three dots inside the braces - shows the numbers in the set continue on without end.
14. Two or more quantities which are multiplied.
15. A natural number which indicates how many times a base is used a factor.
17. The set of all elements that are in sets A or B.
20. Each item in a set
21. A set with no elements.
23. A set is written by enclosing the elements within ________.
25. A set with no elements.