Question

find the sum of greatest and smallest number of four digits​

Answer 1

Answer:

As we know in the largest 4 digit number all the places can be filled by the largest digit which is nine (9).

So the largest 4 digit number is = 9999. Now we have to calculate the sum and difference of these two numbers.

Therefore, the sum of the largest and smallest four digit numbers is 10999.

Answer 2

Step-by-step explanation:

9999 is the greatest 4 digit number

1111 is the smallest 4 digit number