SOLUTION: I'm using The Complete Idiot's Guide to Pre-Algebra. I'm working on signed numbers and the answer to this one problem doesn't make sense.
-13 + 5= ? My answer was -8. The book s
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-> SOLUTION: I'm using The Complete Idiot's Guide to Pre-Algebra. I'm working on signed numbers and the answer to this one problem doesn't make sense.
-13 + 5= ? My answer was -8. The book s
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Question 885899: I'm using The Complete Idiot's Guide to Pre-Algebra. I'm working on signed numbers and the answer to this one problem doesn't make sense.
-13 + 5= ? My answer was -8. The book says the answer is -7. Here is the explanation: This is the same as -(13-5)= -7. -13 is negative and 5 is positive, but 5 is less than 13, so you should expect the answer to be negative. Found 2 solutions by Alan3354, MathTherapy:Answer by Alan3354(69443) (Show Source):
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I'm using The Complete Idiot's Guide to Pre-Algebra. I'm working on signed numbers and the answer to this one problem doesn't make sense.
-13 + 5= ? My answer was -8. The book says the answer is -7. Here is the explanation: This is the same as -(13-5)= -7. -13 is negative and 5 is positive, but 5 is less than 13, so you should expect the answer to be negative.
Subtracting 5 from 13 results in 8, after which the operation before the larger number (-) is kept.
How can 13 - 5 give 7? Are you sure you're looking at the right answer?
