Lesson Plan 1.1 Variables and Expressions

1.1 Variables and Expressions


  1. Variables are letters or symbols used in place of a quantity we don’t know yet.
  2. An Expression is a mathematical phrase that contains numbers, variables and symbols.
  3. Symbols or Operators are signs such as (+) and (-). Numbers and variables have operators.
  4. Coefficient is the number attached to a variable such as 7d. You have to multiply the number 7 by the variable d.
  5. A Constant is the number that stays fixed in an expression. For example: 4x + 10. The constant is 10.
  6. Terms are parts of the expression. For example: In the expression 2x + 3, there are two terms.


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