Pearson Algebra 1 Common Core, 2011
PA
Pearson Algebra 1 Common Core, 2011 View details
5. Adding and Subtracting Real Numbers
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Exercise 18 Page 34

Adding can be thought of as going right on the number line.

20

Practice makes perfect
Let's perform the addition.
11+9
20

Below we will demonstrate by finding 11 and moving 9 units to the right on the number line.

The resulting position after moving to the right on the number line is the sum. 11+9=20