Question

difference between the smallest four digit number and the three digit number formed when written single digit numbers in descending order​

Answer 1

Answer:

The difference is $3900$.

Step-by-step explanation:

We need to find the difference between the smallest four-digit number and the three-digit number.

The numbers should be formed by single-digit numbers in descending order.

The smallest four digit number with single-digit numbers in descending order is

Let the first digit be 4, then 2, followed by 1 and 0.

The number will be 4210.

Now the smallest three-digit number with single-digit numbers in descending order is

Let the first digit be 3, then 1 and 0.

The number will be 310.

The difference between the numbers is $4210-310=3900$.

Answer 2

The difference is 3000

Given : The smallest four digit number and the three digit number formed when written single digit numbers in descending order

To find : The difference

Solution :

The four digit number has four digits

Since single digit numbers in descending order

Digit at ones place = 0

Digit at tens place = 1

Digit at hundreds place = 2

Digit at thousands place = 3

So the smallest four digit number with single digit numbers in descending order is 3210

The three digit number has three digits

Since single digit numbers in descending order

Digit at ones place = 0

Digit at tens place = 1

Digit at hundreds place = 2

So the smallest three digit number with single digit numbers in descending order is 210

Hence the required difference

= 3210 - 210

= 3000

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