class 20, november 10, 2015 lessons 3.6 & 3.7. by the end of this lesson, you should understand...
TRANSCRIPT
MATH 092-013 Mathematical Literacy for
College Students IClass 20, November 10, 2015
Lessons 3.6 & 3.7
By the end of this lesson, you should understand that:
◦ Addition and subtraction are inverse operations
◦ Multiplication and division are inverse operations
◦ Solving for a variable includes isolating it by “undoing” the actions to it
Lesson 3.6 Objectives
By the end of this lesson, you should be able to:
◦ Solve for a variable in a linear equation
◦ Explicitly write out the order of operations to evaluate a given expression
Lesson 3.6 Objectives
Main idea:◦ Solving equations is based on the principle of
undoing operations (and steps) and balancing each operation
Lesson 3.6 Connections
By the end of this lesson, you should understand:
◦ Proportional relationships are based on a constant ratio
◦ Rules for solving equations can be applied in unfamiliar situations
Lesson 3.7 Objectives
By the end of this lesson, you should be able to:
◦ Set up a proportion based on a contextual situation
◦ Solve a proportion using algebraic methods
Lesson 3.7 Objectives
Main idea:◦ Proportionality preserves the ratio between
values
Main idea:◦ Mathematical rules are consistent: foundational
rules for solving equations can be used on any equation
Lesson 3.7 Connections