8.NS.A2

3. To determine which of two numbers is greater, less, or if they are equal.
5. To find the value of a mathematical expression.
7. An irrational number representing the ratio of a circle’s circumference to its diameter. Approximately equal to 3.14159.
9. A number that produces a specified value when used three times in a multiplication. Example: ∛8 = 2.
11. A diagram that represents numbers as points on a line, used to compare or locate numbers visually.
13. A rough calculation or educated guess of the value of a number or expression.
14. A mathematical phrase that can contain numbers, operations, and/or variables, but no equal sign.
15. A number that can be written as a fraction (or ratio) of two integers. Its decimal either terminates or repeats.

1. The numerical worth of an expression or number.
2. To find the position of a number on a number line.
4. A number that produces a specified value when multiplied by itself. Example: √16 = 4.
6. A value that is close to but not exactly equal to an exact number. Often used when working with irrational numbers.
8. Any number that can be found on the number line, including rational and irrational numbers.
10. A number that cannot be written as a fraction of two integers. Its decimal goes on forever without repeating.
12. The decimal form of a number. Irrational numbers have non-repeating, non-terminating decimal expansions.