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Pearson Algebra 1 Common Core, 2011

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Pearson Algebra 1 Common Core, 2011 View details

5. Adding and Subtracting Real Numbers

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Exercise 38 Page 34

Instead of subtracting a negative number, you can add.

4.6

Practice makes perfect

Let's perform the subtraction.

- 2.9-(- 7.5)

a-(- b)=a+b

- 2.9+7.5

Add terms

4.6

We can see that subtracting a negative number is the same as adding its positive counterpart. Below we will demonstrate by finding - 2.9 and moving 7.5 units to the right on the number line.

The resulting position after moving to the right on the number line is the difference. -2.9-(- 7.5)=4.6

Subchapter links

Lesson Check p.33

Practice and Problem-Solving Exercises p.34-36

Standardized Test Prep p.36

Mixed Review p.36