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ADDING EXPRESSIONS WORKSHEET
ALGEBRA I



Name:  _________________________________________  Date:  _______

Model the following variable expressions:

1.       2x2 -3x + 4                    2.     -x2 + 3x -2

Add the following expressions, demonstrate using algebra tiles:

a. (2x2 -3x + 4) + (-x2 + 3x -2)

b. (-x2  +2x -5) + (2x2 -3x +2)

c. (-x2  +2x -5) - (2x2 -3x +2)

d. (x2 + 3x + 4) - (-2x2 + x - 2)

e. (3x -2) - (2x2 +1)


Analyze your answers in a-d above.  What “rule” can you write for adding expressions?


When you add expressions you are actually adding the ______________ of each of the __________________ terms of the expressions.


Using the rule above solve the following problems.  (DO NOT model with tiles)

3.  (4x + 5) + (-3x -1)

4.  (4 + 5x) - (x +6)

5.  (8 + x)  - (2x -4)