2.2 Writing Equations.

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Presentation transcript:

2.2 Writing Equations

Expression vs. Equation? What is the difference? Expression is like a phrase in a sentence. Ex: when I went to the zoo… Ex: the other day… Equation is like a complete sentence. Ex: When I went to the zoo, I saw a giraffe.

Expressions Are NOT complete. They do not have an = sign. 4x + 3

Equations They ARE complete (like a complete sentence). They have an = sign. Ex: 4x + 2 = 10 Ex: 3 x 4 + 11 = 23

How do we say “=“? Equals Is equal to Is Is the same as

Try this… 8 increased by the number x is 22. 8 + x = 22 two less than a number y is 4. y – 2 = 4

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Independent Practice (Homework) Groups 2-4: pp. 37-38, # 1- 20 Group 1: pp. 37-38, #9-29