SOLUTION: evaluate the following expressions without a calculator. -15+(-7)

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Question 237223: evaluate the following expressions without a calculator.
-15+(-7)
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
-15+(-7)

Think of negative numbers as money that you spend, and positive numbers as money that is coming in to you. In this case, you have 15 (dollars!) going out, and then another 7 dollars going out. This is a total of 22 dollars out, or a -22.

Dr. Robert J. Rapalje