Pre-Algebra

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Using Formulas to Solve Math Problems
Using Formulas to Solve Math Problems 150 150 Deborah

  Overview: Some relationships between variables can be solved for in terms of common formulas.  For example, the formula for the circumference of a circle is C=πd.  This equation shows…

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Math Review: Fractions to Decimals
Math Review: Fractions to Decimals 150 150 Deborah

Overview: Simple fractions and mixed numbers are often turned into equivalent decimals for ease of operations in addition, subtraction, multiplication, and division.  They are easier to use on a calculator…

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Introduction to Rational Numbers
Introduction to Rational Numbers 150 150 Deborah

Overview: Rational numbers are numbers that can be expressed as a ratio of integers, such as 5/6, 12/3, or 11/6.  The denominator can be 1, as in the case of…

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Math Review of the Number Pi
Math Review of the Number Pi 150 150 Deborah

Overview: The number pi (π) is one of the most important and useful numbers in math calculations involving circles, spheres, and other circular objects.  It is an irrational number with…

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Math Review of Positive and Negative Exponents
Math Review of Positive and Negative Exponents 150 150 Deborah

Overview: Exponents, or powers, are shorthand for repeated multiplication of the same number, variable, or expression.  They are especially useful to describe variables and expressions that are multiplied over and…

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Solving for a Variable
Solving for a Variable 150 150 Deborah

Overview: In order to solve some algebraic equations, it is important to choose a variable within the equation and then solve the equation in terms of that variable. One strategy is…

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Math Review of Absolute Value
Math Review of Absolute Value 150 150 Deborah

Overview: Number sentences involving absolute value refer to a number’s distance from zero.  Absolute value has a number of applications, including measurements and tolerances.  It is important to read problems…

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Ratios and Proportions
Ratios and Proportions 150 150 Deborah

Overview: Ratios and proportions are common ways to compare numbers.  They have many mathematical applications, such as scale models, percentages, and interest.  Ratios and proportions can be set up with…

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Math Review of Problem-Solving Strategies: Writing Equations
Math Review of Problem-Solving Strategies: Writing Equations 150 150 Deborah

Overview: The next step in solving a verbal problem is to write an equation that takes into account the relevant information in the problem.  After reading the problem carefully, summarize…

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Math Review of Graphs and Tables
Math Review of Graphs and Tables 150 150 Deborah

Overview: Graphs and tables are good ways to show mathematical relationships and display data.  They are an important part of solving problems and illustrating trends.  Although the same information can…

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