Decimal System :  In decimal system, we use ten symbols  0, 1, 2, 3, 4, 5, 6, 7, 8 and 9, which are called digits. These digits  are valid on National and International levels both (দশমিক ব্যৱস্থাত আমি দহটা চিহ্ন 0, 1, 2, 3, 4, 5, 6, 7, 8 আৰু 9 ব্যৱহাৰ কৰো, যিবোৰক সংখ্যা বোলা হয়। এই সংখ্যাসমূহ ৰাষ্ট্ৰীয় আৰু আন্তঃৰাষ্ট্ৰীয় দুয়োটা পৰ্যায়তে বৈধ)

Numeration System : Numeration system deals with  expressing a number in words (সংখ্যা ব্যৱস্থাই এটা সংখ্যা শব্দৰে প্ৰকাশ কৰাৰ কাম কৰে)

Indian/Hindu-Arabic System

International System

Example

Q. Convert the following numbers into figure form 

a. Five crore nine lakh sixty thousand and nine  

• 5 × 10⁷ + 9 × 10⁵ + 60 × 10³ + 9 × 1
• 50000000 + 900000 + 60000 + 9
• 50960009

b. Five million eight thousand seventy one  

• 5 × 10⁶ + 8 × 10³ + 7 × 10 + 1 × 1
• 5000000 + 8000 + 70 + 1
• 5008071

Q. Convert each of the following numbers into  words in both Indian and International Systems. 

(i) 973276  

Indian System = Nine lakh seventy three thousand two hundred  seventy six.  

International System = Nine hundred thousand seventy three  thousand two hundred seventy six.  

(ii) 1000567  

Indian System = Ten lakh five hundred sixty seven.  

International System = One million five hundred sixty seven.