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Math Unit_7

Exponents and Negative Numbers Vocabulary

Account Balance An amount of money that you have or that you owe.
Exponential notation A way to show repeated multiplication by the same factor. For example, 23 is exponential notation for 2 * 2 * 2.
Expression A mathematical phrase made up of numbers, variables, operation symbols, and/or grouping symbols. An expression does not contain symbols such as =, <, or >. Examples: 2 + 3 √2ab л r2 9x - 2
Negative Number A number that is less than zero; a number to the left of zero on a horizontal number line or below zero.
Nested Parentheses Parenthesis inside a parenthesis in an expression. Expressions are evaluated from within the innermost parentheses outward following the order of operations. Example: ((6 + 2) * 3) / 2 (8 * 3) / 2 24 / 2 = 12
Number-and-Word Notation A way of writing a number using a combination of numbers and words. For example, 27 billion is number-and-word notation for 27,000,000,000.
Opposite of a Number A number that is the same distance from 0 on the number line as given number, but on the opposite side of 0. For example, the opposite of +3 is –3.
Order of Operations Rules that tell in the order in operations in an expression should be carried out. The order of operations is:1. Do operations inside grouping symbols first. (Use rules 2-4 inside the grouping symbols.)2. Calculate all the expressions with exponents.
Parentheses ( ) Grouping symbols used to indicate which operations in an expression should be done first.
Scientific Notation A system for writing numbers in which a number is written as the product of a power of 10 and a number that is at least 1 and less than 10. For example, 3*105 is scientific notation for 300,000.
Slide Rule An Everyday Mathematics tool used for adding and subtracting integers and fractions.
Standard Notation the most familiar way of representing whole numbers, integers, and decimals. For example, standard notation for three hundred fifty six is 356.
Created by: mrsthompson