CHAPTER 3 3.1: Writing Expressions and Equations.

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Presentation transcript:

CHAPTER 3 3.1: Writing Expressions and Equations

WHAT YOU’LL LEARN AND WHY  How to define a variable and write a verbal phrase or sentence as a simple algebraic equation or expression.  To be able to solve real-world problems by transforming them into mathematical equation to solve.

KEY WORDS TO LOOK FOR  Words and phrases in problems often suggest a mathematical operation. ADDITION SUM MORE THAN INCREASED BY IN ALL SUBTRACTION DIFFERENCE LESS THAN LESS DECREASED BY MULTIPLICATION EACH PRODUCT MULTIPLIED TWICE DIVISION DIVIDE QUOTIENT PER SEPARATE ISEQUALS SIGN

EXAMPLE: Write the phrase: five dollars more than Jennifer earned as an algebraic expression.

EXAMPLE: 3 more runs than the Pirates scored.

EXAMPLE

The tallest waterfall in the United States is Yosemite Falls in California with a height of about 739 meters. This height is 617 meters taller than Raven Cliff Falls. What is the equation that represents this situation?

EXAMPLE North American cougars are about 1.5 times as long as cougars found in the tropical jungles of Central America. If North American cougars are about 75 inches long, how long is the tropical cougar? Write an equation that models this situation.

HOMEWORK #22 Worksheet 3.1 – Skills Practice