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Combining Like Terms. Only combine terms that are exactly the same!! Whats the same mean? –If numbers have a variable, then you can combine only ones.

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Presentation on theme: "Combining Like Terms. Only combine terms that are exactly the same!! Whats the same mean? –If numbers have a variable, then you can combine only ones."— Presentation transcript:

1 Combining Like Terms

2 Only combine terms that are exactly the same!! Whats the same mean? –If numbers have a variable, then you can combine only ones that have the same variable –You can also combine numbers that have no variables

3 Vocabulary Simplify Rewrite an expression as simply as possible. Reducing to lowest terms.

4 5 pillows + 3 pillows 8 pillows

5 5a + 3a 8a

6 8c - 3c 5c

7 5 cats + 3 dogs

8 Examples Which terms are the same or like terms? 5x, 8y, 9z, 10, 12x, 14z, 7 Same: 5x and 12x Same: 10 and 7 Same: 9z and 14z

9 12r – 8 – 12

10 12r –8 –12 12r –8 –12 12r – 20

11 Lets try it! 4x + 9x 13x -7y + 9y 2y -8y + (-4y) -12y 4x + 8y + 10x 14x + 8 y 5 + 8x + 7y x + 7y + 15

12 We can only add and subtract like terms

13 Practice Problems: 1.4x + 5y – 2x + 3y 2.5x - 3y) + 2x + y x – 4y + 2y – 8x 4.(-13) + (-2y) + (-7) – 4y 5. 16x – 3y - 4y – 3x


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