Page 123 - New Medley 5 Semester 1

In this chart, we see three periods, namely Ones, Thousands and Millions.
The periods after millions, period to the left, are Billions and Trillions,

but we shall confine ourselves to numbers having nine digits only.

We write the given number in figures as: 624,850,793 or 624850793

And the given number in words as:

Six hundred twenty-four million, eight hundred fifty thousand, seven
hundred ninety-three

Differences between the Indian and the International Systems of Numeration

Indian System International System

1. Ones periods have three places 1. All the periods have three places.

and rest all the periods have two
places only.

2. The names of the periods from 2. The names of the periods from
right to left are Ones, Thousands, right to left are Ones, Thousands,

Lakhs, Crores, etc. Millions, Billions, etc.

Relationship Between These Two Systems

Comparing the two systems, we find that the first five places remain the

same. After the five places,

1 lakh = 100 thousands
10 lakhs = 1 million

1 crore = 10 millions
10 crores = 100 millions

Example 28: Write the following numbers in figures and also in words
according to the International System of Numeration.

(a) 347268109

(b) 86432475

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