Having difficulties with signed numbers when it comes to multiplication, division, addition and subtraction. Is there a simpler way to remember how to use the signs in math problems?

Question

Ayesha Gomez · Accepted Answer

Let two negative numbers be -a and -b. For example : -2 and -5. Let us consider the rules for individual arithmatic operations: Addition of 2 negatuve numbers: −a+(−b): negative e.g, −2+(−5)=−7 Substraction of 2 negative numbers: (−a)−(−b) is negtive if |a|&amp;gt;|b| and positive therwise. e.g, (−2)−(−5)=−2+5=3 (positive) as |−2|&amp;lt;|−5| Multiplication of 2 negative numbers: (−a)⋅(−b)=ab: positive e.g., (−2)⋅(−5)=10 Division of 2 negative numbers: −a−b: positive e.g, −2−5=0.40

Having difficulties with signed numbers when it comes to multiplication, division, addition and subtraction. Is there a simpler way to remember how to use the signs in math problems?

Answered question

Answer & Explanation

New Questions in Pre-Algebra