International System of Numeration
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The international system is followed by most of the countries of the world. In this system, a number is split up into groups or periods.In the Inter-national System of Numeration, we use ones, tens, hundreds, thousands, millions and billions.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.
One million is a thousand thousands.
Example : The number 50,801,592 is read as fifty million, eight hundred and one thousand, five hundred and ninety two.
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| 100 B|10 B| 1 B | 100 M|10 M| 1 M | 100 Ths|10 Ths| 1 Th | 100 |10|1 |
Example : 1)Insert commas in 8643871 and write it in words.
Solution : 8 , 643 , 871 --->Eight million six hundred forty-three thousand eight hundred seventy-one.
Example : 2) Insert commas in 124686 and write it in words.
Solution : 124 , 686 ---->One hundred twenty four thousand six hundred eighty six.
Example : 3) Write "Ten million and seven" in numerals.
Solution : 10 , 000 , 007
Example : 4) How many millions make a billion?
Solution : 1000 millions make a billion.
Example : 5) Write 345,567 in word form
Solution : Three hundred forty five thousand and five hundred sixty-seven
Example : 6) Insert commas in 1234789
Solution : 1,234,789
Note : Commas are used to mark thousands and millions. It comes after every three digits from the right.
The first comma marks thousands and the next comma marks millions.
Number System
• International system of numeration
• Roman Numbers
• Rounding Numbers
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