What is Algebra

1
What is Algebra?

• An Introduction to Algebra
• By Ms. Meichenbaum

2
What is a variable?

• A variable is a letter used to represent a
  number. Sometimes a variable can represent a
  range of numbers if more than one number could
  work in the given problem.

3
Why use x?

• Although most textbooks and worksheets use the
  letter x as a variable, other letters can be
  used to represent time t, velocity v, height
  h, etc.
• Some letters to stay away from using as
  variables
• O, It looks like a zero (0).
• Lower case L, It looks like a one (1).
• Upper case i, It looks like a one (1).
• Only use z if you put a line through the middle
  so as not to confuse it with a two (2).

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When is algebra the way to go?

• In earlier grades, you used to have worksheets
  that asked you to solve for ? or an empty box.
  That was algebra! Instead we use letter
  variables like x to represent the numbers
• Word problems have a lot of information.
  Some-times it is easier to organize what you
  have/need using a variable to represent the piece
  of information for which you are solving.

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Tips to Remember

• Dont let Algebra scare you!
• Math is a language and like any language you need
  to practice to be good at it.
• Practice makes perfect! So stay on track with
  assignments and homework!

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If you get stuck

• The worst thing you not ask for help and fall
  behind. If you feel you are lost, ask for help
  from
• Me
• A friend who understands the material
• An after-school tutor
• Or anyone you trust who helps you but doesnt
  give you the answers without building your
  understanding of the material.

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Any questions?