Answer :
Answer: similarity 1 is thousands in both numbers
Difference is that 1 is a unit thousand in one and tens of thousands in other.
Step-by-step explanation:
They are similar in the sense that one is in thousands in the two numbers and they are both integers
The difference is that in 261,877 number, 1 is a unit thousand
While in 19,504 number, 1 is a tens of thousands.