Chapter 9 - Basic Algebra - 9.2 Adding and Subtracting Signed Numbers - 9.2 Exercises - Page 640: 11

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To add $-2+(-5)$, we can take the absolute value of both numbers. $|-2|=2$ $|-5|=5$ To add two negative numbers, we can add the absolute value of both numbers and then add a negative sign in front of the result. $|-2|+|-5|=2+5=7$ Therefore, $-2+(-5)=-7$.