 Math, Grade 6
 Ratios

Comparing Numbers with Ratios
 Equivalent Ratios
 Comparing Numbers with Ratios
 Expressing Ratios
 Tape Diagrams
 Double Number Lines
 Double Number Line for Modeling
 Expressing Ratios Numerically
 Student Project
 Using Ratio Tables to Solve Problems
 Relate Ratio Tables to Graphs
 Glide Ratio
 Apply Your Knowledge about Ratios
 Finding Percents
 Percent Statements about Data
 Percents Greater than 100%
 Student Self Check
 Gallery Problems
 Student Presentations
 Peer Review
Instructor Overview
This lesson formally introduces and defines a ratio as a way of comparing numbers to one another.
Key Concepts
A ratio is defined by the following characteristics:
 A ratio is a pair of numbers (a:b).
 Ratios are used to compare two numbers.
 The value of a ratio a:b is the quotient a ÷ b, or the result of dividing a by b.
Other important features of ratios include the following:
 A ratio does not always tell you the values of quantities being compared.
 The order of values in a ratio matters.
Goals and Learning Objectives
 Introduce a formal definition of ratio.
 Use the definition of ratio to solve problems related to comparing quantities.
 Understand that ratios do not always tell you the values of the quantities being compared.
 Understand that the order of values in a ratio matters.
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