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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 2 Page 33

From the starting point of - 2 on a number line, move 1 unit in the negative direction.

- 3

Practice makes perfect

We can use a number line to determine the sum - 2+(-1). When adding a positive number you move to the right on the number line. By contrast, when adding a negative number you move to the left on the number line. Starting at - 2 on a number line, we will move 1 unit to the left. This is in the negative direction.

Thus, - 2+(-1)=- 3.

Subchapter links

Lesson Check p.33

Practice and Problem-Solving Exercises p.34-36

Standardized Test Prep p.36

Mixed Review p.36