Subtracting and adding integers

Question

p-positive

n-negative

 

p+p=

n+n=

p+n=

n+p=

p-p=

n-n=

p-n=

n-p=

Answer 1

Given:

p>0, n<0

Assuming that p and n are real numbers

p+p>0

n+n<0

p+n>0 for |p|>|n| and <0 for |n|>|p|

n+p>0 for |p|>|n| and <0 for |n|>|p|

p-p=0

n-n=0

p-n>0 (because n is negative to start with)

n-p<0