What are the rules for subtracting positive and negative numbers?

What are the rules involved in adding directed numbers?

  • When children learn about directed numbers in school they mix up the rules which apply when adding directed numbers with the rules that apply when multiplying and dividing directed numbers.

  • Answer:

    Numbers are like soldiers. A Number either belongs to the PLUS army or the MINUS army. If numbers from the same army meet they simply join forces. If numbers from opposing armies meet a battle ensues. One PLUS will kill one MINUS and the army with the most number of soldiers will win the battle. Example 1 -3 + 5 = +2 Example 2 -3 - 5 = -8 Please read my following article for more details http://hubpages.com/hub/Life-and-Death-Mathematics

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