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#### Ontario Curriculum Expectation:

#### 4.C2.1 identify and use symbols as variables in expressions and equations.

An **algebraic expression **is a number sentence with numbers, variables, and operations.

The **operation **can be addition, subtraction, multiplication, or division. Here is an example of an algebraic expression of “* a *plus 6”.

An **algebraic equation **is a number sentence with an equal sign between an algebraic expression and a number.

Here is an example of an algebraic equation that means “* a *plus 6 equals to 9”.