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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 17 Page 34

From the starting point of -9 on a number line, move 3 units in the negative direction.

-12

Practice makes perfect

We can use a number line to determine the sum -9 +(-3). Starting at -9 on a number line, we will move 3 units to the left. This is three units in the negative direction.

Thus, -9 + (-3)=-12.

Subchapter links

Lesson Check p.33

Practice and Problem-Solving Exercises p.34-36

Standardized Test Prep p.36

Mixed Review p.36