Introduction To Equations
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Introduction To Equations

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Introduction to Equations - Beginnning Algebra

Introduction to Equations - Beginnning Algebra

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Introduction To Equations Introduction To Equations Presentation Transcript

  • AIM: What is an equation and what does it mean to “solve” one ? OBJECTIVE: S.W.B.A.T. identify equations and think about what it means to solve equations Homework: Write two false equations and two true equations. Involve all four basic operations (addition, subtractions, multiplication, division) at least once October 1 , 2007 DO NOW What symbol will you always see in an equation ?
  • Our new unit - Equations
    • Equations are statements of equality between two or more quantities.
    • Equations always have equal signs (=)
    • Like all statements equations can be true, false, or open.
    • Examples of true equations
    • 3 = 2 + 1
    • =
    • 4 = 8 ÷2
    • π – π = 0
  • Equations – Open statements Open equations are equations which are neither true nor false. They usually require more information.
    • Examples of open statements:
    • This dog is big.
    • That woman is her mother.
    • The book is closed.
    • Examples of open equations:
    • y – 3 = 0
    • r ÷ 4 = 9
    • c + 2 = 7.3
  • Equations – Solving When we are directed to solve an equation we want to find the value of the variable which will make the equation true! To solve x – 6 = 10 we look for a number which we could substitute for x which would give us 10 on the right side of the equal sign! 16
  • Equations – Cover up method 1)Solve 26 = 8 + v 26 = 8 + v Guess and check until you find what is missing! v = 18
  • Equations – Cover up method 7)Solve m − 9 = −13 m − 9 = −13 Guess and check until you find what is missing! m = -4