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Big Ideas Math Integrated I, 2016 View details

4. Graphing Linear Equations in Standard Form

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Exercise 39 Page 134

What happens when we subtract a negative number?

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To simplify this expression, we need to consider the order of operations. We should fully simplify the numerator and denominator before trying to calculate the quotient.

2-(-2)/4-(-4)

SubNeg

a-(- b)=a+b

2+2/4+4

AddTerms

Add terms

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ReduceFrac

a/b=.a /4./.b /4.

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Understanding Subtracting a Negative Number

The idea of subtracting a negative number might be confusing. a-(- b)=a+b Try thinking about it in terms of English instead. When a double negative is used in conversation, it changes the meaning to be positive.

Your friend: Why are you going to the school play this Saturday?
You: I would never NOT go to a school play! I get extra credit in my English class if I go!

Saying never not means you always go. Math works the same way!

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Communicate Your Answer p.129

Monitoring Progress p.130-132

Exercises p.133-134

Exercise 39 Page 134

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