Question

Which choice is the same as the difference between a number and itself?

Answer 1

0. 
1-1=0
2-2=0
3-3=0
23-23=0
123-123=0

Answer 2

Answer:

$(n-n)=0$

Step-by-step explanation:

Let

n-----> the number

The expression"the difference between a number and itself" is equivalent to the algebraic expression

$(n-n)=0$