Question

Write the difference of the smallest and the largest numbers of $4$-digits.

Answer 1

Step $1$; Find the smallest numbers of $4$-digits.

The smallest $4$-digits number is $1000$

Step $2$; Find the largest numbers of $4$-digits.

The largest $4$-digits number is $9,999$

Now difference of $9,999$ and $1,000$

Difference $=9,999-1,000=8,999$

Hence, the difference of the smallest and the largest numbers of $4$-digits is $8,999$