1.8 Number Systems Positive Numbers Negative Numbers Natural Numbers

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Presentation transcript:

1.8 Number Systems Positive Numbers Negative Numbers Natural Numbers Define the vocabulary words in your notes. Positive Numbers Negative Numbers Natural Numbers Integers Rational Numbers Square Root Perfect Square Irrational Numbers Real Numbers

Categorizing Numbers Real Numbers Irrational Numbers Integers Whole #s Natural #s

Name the set or sets of numbers to which each real number belongs Real, Rational Real, Rational, Integer, Whole, Natural Real, Irrational

Closure Property: When you combine any two elements of a set using an arithmetic operation, the result is also included in the set. Example #2: Determine whether each set of numbers is closed under the indicated operation. A) whole numbers, multiplication Yes B) whole numbers, subtraction No (could end up negative)

Graph: To draw, or plot, the points named by those numbers on a number line. Coordinate: The number that corresponds to a point on a number line. Open dot (circle) means “don’t include” Closed (solid) dot (circle) means “do include” Graph the set of number x > -2

Radicals Example #4 Find Radical sign: Used to indicate a nonnegative or principal square root. Example #4 Find

Homework Assignment #7 p. 51 22-62 even, 69-70