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Adding and Subtracting Negative Numbers

Adding and Subtracting Negative Numbers. www.tutors4gcse.co.uk Tel : 0800-048-8864. Adding a negative number. Here we had +10 and we’ve added -5 , this can be written as:- +10 + (-5) =. Consider this:-. +1. +1. -1. +1. -1. +1. +5. +1. +1. -1. +1. +1. -1. +1. +1. -1.

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Adding and Subtracting Negative Numbers

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  1. Adding and Subtracting Negative Numbers www.tutors4gcse.co.uk Tel: 0800-048-8864

  2. Adding a negative number • Here we had +10 and we’ve added -5 , this can be written as:- • +10 + (-5) = • Consider this:- +1 +1 -1 +1 -1 +1 +5 +1 +1 -1 +1 +1 -1 +1 +1 -1

  3. Subtracting a negative number • What if we take away the -5:- • So, we started with +5 and we take away -5 • +5 - (-5) = • So taking away a negative has the same effect as adding a positive one +1 +1 -1 +1 -1 +1 +10 +1 +1 -1 +1 +1 -1 +1 +1 -1

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