Solution:

To find out the greatest number of 9 digits, we need to consider the number with all the digits as 9.

Therefore, the greatest 9 digit number is 999999999.

To find out the greatest number of 3 digits, we need to consider the number with all the digits as 9.

Therefore, the greatest 3 digit number is 999.

Now, we need to divide the greatest number of 9 digits i.e., 999999999 by the greatest number of 3 digits i.e., 999.

The division can be performed as follows:

1001001
____________
999|999999999
|999
|_________
|000999999
|000999
|_________
|000000999
|000000999
|__________
0

Therefore, the answer is option 'A' i.e., 1001001.

Explanation:

To divide any two numbers, we need to follow certain steps. In this case, we need to perform the following steps:

Step 1: Find out the greatest number of 9 digits i.e., 999999999.

Step 2: Find out the greatest number of 3 digits i.e., 999.

Step 3: Perform the division by placing the dividend i.e., 999999999 under the division symbol and the divisor i.e., 999 outside the division symbol.

Step 4: Check how many times the divisor i.e., 999 can be divided by the first few digits of the dividend i.e., 999. In this case, 999 can be divided by 999 only once.

Step 5: Write down the quotient i.e., 1 above the first digit of the dividend i.e., 9.

Step 6: Multiply the divisor i.e., 999 by the quotient i.e., 1 and write down the result below the first few digits of the dividend i.e., 999.

Step 7: Subtract the result obtained in step 6 from the first few digits of the dividend i.e., 999 to get the remainder i.e., 0.

Step 8: Bring down the next digit of the dividend i.e., 9 and add it to the remainder i.e., 0 to get the new dividend i.e., 09.

Step 9: Repeat steps 4 to 8 until all the digits of the dividend i.e., 999999999 are used.

Step 10: The final answer is the quotient obtained in step 5 i.e., 1001001.

Maths exceise 8.2