Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
Chapter Review
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Exercise 58 Page 71

Move 7 units to the left.

- 9

Practice makes perfect

We can use a number line to determine the sum - 2+(- 7). Starting at - 2 on a number line, we will move 7 units to the left. This is seven units in the negative direction. The point at which we stop on the number line illustrates the sum of - 2 and -7.

Thus, - 2+(- 7)=- 9.