Question

$648340021$ is written with commas as (International System)

• A. $648,340,021$
• B. $6,4,8,3,4,0,0,2,1$
• C. $64,83,40,02,1$
• D. none of these

Answer 1

The correct option is A $648,340,021$

In international system of numeration,
The 1st period consists of - ones, tens and hundred.
The 2nd period consists of - thousand, 10 thousand and 100 thousands.
The 3rd period consists of - million, 10 million and 100 million.
The 4th period consists of - billion, 10 billion and 100 billion.
$\therefore$648340021 is written with commas as (International System)= 648,340,021
Option A is correct.