Dividing Rational Numbers, Pre Algebra

Dividing Rational Numbers

V. Rational Number Operations: Lecture 4 | 12:08 min

Lecture Description

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Dividing Rational Numbers

Two numbers are reciprocals if their product is 1. Examples are 2/3 and 3/2.
In order to divide fractions, you must find the reciprocal of the second fraction and then multiply numerators and denominators.
In order to divide decimals, the divisor cannot contain a decimal. To clear the divisor of the decimal, move the decimal to the right; move the decimal in the dividend the same number of places.

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Table of Contents

I. Variables and Algebraic Expressions
	Numerical Expressions	13:41
	Algebraic Expressions	9:11
	Writing Expressions	8:24
	Estimating for Reasonableness	10:20
	Properties of Numbers	12:01
	Distributive Property	9:40
II. Integers and Exponents
	Integers and Absolute Value	11:35
	Adding Integers	10:20
	Subtracting Integers	12:01
	Multiplying Integers	14:28
	Dividing Integers	20:18
	Positive Exponents	20:05
III. Equations and Applications
	Solving Addition Equations	21:47
	Solving Subtraction Equations	19:34
	Solving Multiplication and Division Equations	26:11
	Solving Two-Step Equations	19:10
	Square Roots	12:16
	Pythagorean Theorem	14:49
	Using the Pythagorean Theorem	16:15
IV. Rational Numbers
	Prime Factorization	16:40
	Greatest Common Divisor	14:16
	Equivalent Fractions	11:22
	Equivalent Forms of Rational Numbers	20:47
	Comparing and Ordering Rational Numbers	20:21
V. Rational Number Operations
	Adding Rational Numbers	15:04
	Subtracting Rational Numbers	14:40
	Multiplying Rational Numbers	11:02
	Dividing Rational Numbers	12:08
	Solving Equations by Adding or Subtracting	13:43
	Solving Equations by Multiplying	11:10
	Zero and Negative Exponents	6:41
VI. Rates and Proportions
	Ratios	7:05
	Rates	12:45
	Dimensional Analysis	16:19
	Application of Rates	17:42
	Proportions	14:36
VII. Applications of Percent
	Fractions, Decimals, and Percents	10:13
	Finding a Percent of a Number	8:39
	Percents and Proportions	15:38
	Percent of Change	11:27
	Applications of a Percent	12:55
VIII. Linear Functions and Graphing
	Graphing in the Coordinate Plane	15:13
	Length in the Coordinate Plane	18:36
	Functions	14:29
	Graphing Linear Functions	16:02
	Slope	17:53
	Slope and Direct Variation	13:50
IX. Inequalities
	Writing Inequalities	17:32
	Solving Inequalities by Adding or Subtracting	9:16
	Solving Inequalities by Dividing	12:15
	Solving Inequalities by Multiplying	14:33
	Solving Two-Step Inequalities	14:15
X. Exponents and Equations
	Properties of Exponents	12:07
	Power Rules	11:58
	Exploring Roots	9:39
	Simplifying Algebraic Expressions	12:43
	Solving Multi-Step Equations	18:35
	Solving Equations with Variables on Both Sides	18:50
XI. Test-Taking Strategies
	Test Taking Strategy Part 1	12:55
	Test Taking Strategy Part 2	11:24
	Test Taking Strategy Part 3	11:36
	Test Taking Strategy Part 4	20:13

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Dividing Rational Numbers

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Dividing Rational Numbers

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