Equations and Expressions

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Presentation transcript:

Equations and Expressions

Expressions and Equations Expressions and Equations can be: Algebraic, Numerical, and Verbal Numerical means it has numbers (4 + 5 = 9) Algebraic means it has letters (4 + x = 9) Verbal means it has words (Janie is 5 years older than her 4 year old sister)

Algebraic, Numerical, or Verbal?

Algebraic, Numerical, or Verbal? 15n – 3 = 17 Algebraic!

Algebraic, Numerical, or Verbal? 2 less than one-third of the points that the Panthers scored. Verbal!

Algebraic, Numerical, or Verbal? 2d + 5 Algebraic!

Expressions 5 + 7 n – 2 4n n ÷ 2 If n represents the amount of songs stored on an MP3 player, analyze the meaning of the expressions.

Expressions Six feet less than the width 6 hours more per week that Theodore studies Six years less than Tracey’s age 2 less than one-third of the points that the Panthers scored

Equations 13 + 4 = 17 10t = 90 22 ÷ y = -2

Equations One Season, the Cougars won 20 games. They played a total of 25 games. Write an equation to find, g, the number of games the team lost. Five friends earn a total of $50 doing yard work in their neighborhood. Each friend earns the same amount. Write an equation to find F, the amount that each friend earns.

Which of the following algebraic expressions cannot represent the phrase half of a number? X ÷ 2 ½ X 2x 0.5x

An expression combines variables, numbers, and at least one operation An equation contains an equals sign showing two expressions are equal

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Expression OR Equation? 15n – 6 Expression!

Expression OR Equation? 6n= 30 Equation!

Expression OR Equation? Ava made picnic boxes that contained 8 sandwiches in each box Expression!

Expression OR Equation? Susan earns $30 a day working at a supermarket Expression!

Expression OR Equation? Elaina made $64 by selling a total of 32 boxes of popcorn Equation!

Expression OR Equation? 15n – 3 = 17 Equation!

Expression OR Equation? 6n Expression!

Expression OR Equation? A company distributes a 15,000 yearly bonus to all its employees. Expression!

Expression OR Equation? Mississippi has 6 electoral votes. Georgia and Mississippi have a total of 22 electoral votes. Equation!

Expression OR Equation? Riley and her sister collect stickers. Riley has 220 stickers in her sticker collection. Her sister has 55 stickers in her collection. Riley has how many times as many stickers as her sister? Equation!

Expression OR Equation? Riley and her sister collect stickers. Riley has 220 stickers in her sticker collection. Her sister’s collection is 55 stickers larger that her collection. Neither! It is an inequality. We will talk about those later.

Expression OR Equation? Neither! It is an inequality. We will talk about those later.

True OR False? Equations like a + 4 = 8 and 4 – m = 2 have exactly one solution TRUE!

True OR False? In m + 8, the variable m can have any value TRUE!

True OR False? In m + 8 = 12, the variable m can have any value and be a solution FALSE!

Pair and Share Share with your neighbor a real world situation that would represent an expression

Pair and Share Share with your neighbor a real world situation that would represent an equation

Pair and Share Share with your neighbor a real world situation that requires two operations.

Writing Equations

Solving Equations