# Copyright 2014 Scott Storla Rational Numbers. Copyright 2014 Scott Storla Vocabulary Rational number Proper fraction Improper fraction Mixed number Prime.

## Presentation on theme: "Copyright 2014 Scott Storla Rational Numbers. Copyright 2014 Scott Storla Vocabulary Rational number Proper fraction Improper fraction Mixed number Prime."— Presentation transcript:

Copyright 2014 Scott Storla Rational Numbers

Copyright 2014 Scott Storla Vocabulary Rational number Proper fraction Improper fraction Mixed number Prime number Composite number Prime factorization Reciprocal

The Rational Numbers Copyright 2014 Scott Storla

Irrational Numbers The real numbers which are not rational. Copyright 2014 Scott Storla Trying to find a rational number that’s equal to pi.

Proper Fraction In a proper fraction the numerator (top) is less than the denominator (bottom). The value of a proper fraction will always be between 0 (inclusive) and 1 (exclusive). Copyright 2014 Scott Storla

Improper Fraction In an improper fraction the numerator (top) is greater than or equal to the denominator (bottom). The value of an improper fraction is greater than or equal to 1. Copyright 2014 Scott Storla

Mixed Number A mixed number is the sum of a positive integer and a proper fraction. Copyright 2014 Scott Storla

Writing a mixed number as an improper fraction The new numerator is the product of the denominator and natural number added to the numerator. The denominator remains the same. Copyright 2014 Scott Storla

Writing an improper fraction as a mixed number 1.Divide the numerator by the denominator. 2.The natural number is to the left of the decimal. 3.Subtract the product of the natural number and original denominator from the original numerator. This is the numerator of the proper faction. 4.The denominator of the proper fraction is the same as the original denominator. Copyright 2014 Scott Storla

Prime Factorization Copyright 2014 Scott Storla

Prime Number A natural number, greater than 1, which has unique natural number factors 1 and itself. Ex: 2, 3, 5, 7, 11, 13 Copyright 2014 Scott Storla

Composite Number A natural number, greater than 1, which is not prime. Ex: 4, 6, 8, 9, 10 Copyright 2014 Scott Storla

Prime Factorization Copyright 2014 Scott Storla

Prime Factorization To write a natural number as the product of prime factors. Ex: 12 = 2 x 2 x 3 Copyright 2014 Scott Storla

Factor Rules Copyright 2014 Scott Storla

Decide if 2, 3, and/or 5 is a factor of 42 310 987 4950 Copyright 2014 Scott Storla

List all positive integers between 51 and 61 inclusive. List all prime numbers between 51 and 61 inclusive. List all rational numbers with denominators of 1 between 110 and 120 inclusive. List all prime numbers between 110 and 120 inclusive. List all natural numbers between 31 and 40 inclusive. List all prime numbers between 31 and 40 inclusive. Copyright 2014 Scott Storla

Building a factor tree for 20 The prime factorization of 20 is 2 x 2 x 5. 20 45 2 2 Copyright 2014 Scott Storla

The prime factorization of 24 is 2 x 2 x 2 x 3. 24 2 12 Find the prime factorization of 24 2 6 2 3 Copyright 2014 Scott Storla

The prime factorization of 315 is 3 x 3 x 5 x 7. 315 5 63 Find the prime factorization of 315 3 21 7 3 Copyright 2014 Scott Storla

The prime factorization of 119 is 7 x 17. 119 7 17 Find the prime factorization of 119 Copyright 2014 Scott Storla

The prime factorization of 495 is 3 x 3 x 5 x 11. 495 5 99 Find the prime factorization of 495 9 11 3 Copyright 2014 Scott Storla

Prime Factorization Copyright 2014 Scott Storla

Reducing Fractions Copyright 2014 Scott Storla

Reducing Fractions A fraction is reduced when the numerator and denominator have no common factors other than 1. Copyright 2014 Scott Storla

Reducing Fractions A fraction is reduced when the numerator and denominator have no common factors other than 1. Copyright 2014 Scott Storla

No “Gozinta” method allowed Copyright 2014 Scott Storla

No “Gozinta” (Goes into) method allowed Copyright 2014 Scott Storla

No “Gozinta” (Goes into) method allowed Copyright 2014 Scott Storla

Simplify using prime factorization Copyright 2014 Scott Storla

Simplify using prime factorization Copyright 2014 Scott Storla

Simplify using prime factorization Copyright 2014 Scott Storla

Reduce using prime factorization Copyright 2014 Scott Storla

Reduce using prime factorization Copyright 2014 Scott Storla

Reduce using prime factorization Copyright 2014 Scott Storla

Reducing Fractions Copyright 2014 Scott Storla

Multiplying Fractions Copyright 2014 Scott Storla

No “Gozinta” method allowed Copyright 2014 Scott Storla

using prime factorizationMultiply Copyright 2014 Scott Storla

Procedure – Multiplying Fractions 1. Combine all the numerators, in prime factored form, in a single numerator. 2. Combine all the denominators, in prime factored form, in a single denominator. 3. Reduce common factors 4. Multiply the remaining factors in the numerator together and the remaining factors in the denominator together. Copyright 2014 Scott Storla

Multiply using prime factorization Copyright 2014 Scott Storla

Multiply using prime factorization Copyright 2014 Scott Storla

Multiply using prime factorization Copyright 2014 Scott Storla

Multiply using prime factorization Copyright 2014 Scott Storla

Multiplying Fractions Copyright 2014 Scott Storla

Dividing Fractions Copyright 2014 Scott Storla

Reciprocal The reciprocal of a number is a second number which when multiplied to the first gives a product of 1. Copyright 2014 Scott Storla

Procedure – Dividing Fractions 1.To divide two fractions multiply the fraction in the numerator by the reciprocal of the fraction in the denominator. Copyright 2014 Scott Storla

Procedure – Dividing Fractions 1.To divide two fractions multiply the fraction in the numerator by the reciprocal of the fraction in the denominator. Copyright 2014 Scott Storla

Divide using prime factorization Copyright 2014 Scott Storla

Divide using prime factorization Copyright 2014 Scott Storla

Divide using prime factorization Copyright 2014 Scott Storla

Divide using prime factorization Copyright 2014 Scott Storla

Dividing Fractions Copyright 2014 Scott Storla