Question

Place commas correctly and write in numerals:
Seven crore fifty two lakhs twenty one thousand three hundred two.

Answer 1

Hint: We will first write it in numerals only starting from the crore part and marking the digits at their place correctly. Now, we will start putting commas from the end of digits by skipping 3 digits and put the first comma and then after every two digits and thus we will have an answer.

Complete step-by-step answer:
Let us first discuss the places starting from crores as we need in our question:-
Crore Ten Lakhs Lakhs Ten Thousand Thousand Hundreds Tens Ones
We see that there are 7 more places after crore.
So if we write our number’s first part, we will get:-
Crore Ten Lakhs Lakhs Ten Thousand Thousand Hundreds Tens Ones
  7 __ ___ ___ ___ ____ ___ ____
Now next we have fifty two lakhs that means 50 lakhs and 2 lakhs which is equivalent to 5 times 10 lakhs and 2 lakhs. Writing this in numeral form, we will have:-
Crore Ten Lakhs Lakhs Ten Thousand Thousand Hundreds Tens Ones
  7 5 2 ___ ___ ____ ___ ___
Next we have twenty one thousand which means: 20 thousand and 1 thousand which is equivalent to 2 times 10 thousand and 1 thousand. Writing this in numeral form, we will get:-
Crore Ten Lakhs Lakhs Ten Thousand Thousand Hundreds Tens Ones
  7 5 2 2 1 ____ ___ ___
Now coming to the next part which is three hundred which means 3 in hundreds places.
We will get:-
Crore Ten Lakhs Lakhs Ten Thousand Thousand Hundreds Tens Ones
  7 5 2 2 1 3 ___ ___
Now at last we have two only, which will take one place that means tens place will have a 0.
Writing this in numeral, we eventually have:-
Crore Ten Lakhs Lakhs Ten Thousand Thousand Hundreds Tens Ones
  7 5 2 2 1 3 0 2
Now, to start putting a comma, first we need to skip the last 3 digits and then put the comma. So, we have:-
75221,302
Now, after this we will put commas after every two digits, then we will get:-
7,52,21,302
Now, we have got our final answer which is: $7,52,21,302.$

Note: The students may try to write the number without using the place values over it. This may create confusion in places. So, it is always better to first write all the place values and then start writing numbers below them.
Before starting to put commas, you must always see if the number is in Indian system of Numeration or International because both have different ideas of putting up commas.
1 million = 10 lakhs 1 billion = 100 crores