NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.1 – Part 4

Q-4 Insert commas suitable and write the names according to international system of numeration:

  1. 78921092

  2. 7452283

  3. 99985102

  4. 48049831

Solution:

The following table shows how the numerals are named in International systems.

Table explaining the relationship between Indian and International system of numbering
Table comparing the Indian and International system and numbering with appropriate use of commas

Hindi

Indian figure

Powernotation

International figure

International Names

one

1

100

1

One

ten

10

101

10

Ten

one hundred

100

102

100

One hundred

one thousand

1,000

103

1,000

One thousand

ten thousand

10,000

104

10,000

Ten thousand

one lakh (also lac)

1,00,000

105

100,000

One hundred thousand

ten lakh

10,00,000

106

1,000,000

One million

one crore

1,00,00,000

107

10,000,000

Ten million

ten crore

10,00,00,000

108

100,000,000

One hundred million

one arab or one hundred crore

1,00,00,00,000

109

1,000,000,000

One billion

ten arab

10,00,00,00,000

1010

10,000,000,000

Ten billion

one kharab

1,00,00,00,00,000

1011

100,000,000,000

One hundred billion

ten kharab

10,00,00,00,00,000

1012

1,000,000,000,000

One trillion

one neel

1,00,00,00,00,00,000

1013

10,000,000,000,000

Ten trillion

ten neel

10,00,00,00,00,00,000

1014

100,000,000,000,000

One hundred trillion

one padm

1,00,00,00,00,00,00,000

1015

1,000,000,000,000,000

One quadrillion

ten padm

10,00,00,00,00,00,00,000

1016

10,000,000,000,000,000

Ten quadrillion

one shankh

1,00,00,00,00,00,00,00,000

1017

100,000,000,000,000,000

One hundred quadrillion

ten shankh

10,00,00,00,00,00,00,00,000

1018

1,000,000,000,000,000,000

One quintillion

Here is an example: 42,342,783 will be called

Putting commas in 42,342,783 and labelling the parts

Putting Commas in 42,342,783

Putting commas in 42,342,783 and labelling the parts

Putting the words in correct location in 42,342,783 to form the numeral in words

Putting the Words in Correct Location in 42,342,783

Putting the words in correct location in 42,342,783 to form the numeral in words

Or Fourty two million, three hundred and fourty two thousand, seven hundred and eighty three.

  1. 78921092

    78921092 named in International System of numeration

    78921092 in International System of Numeration

    78921092 named in International System of numeration

    78,921,092=Seventyeightmillionninehundredtwentyonethousandninetytwo

  2. 7452283

    7452283 named in International System of numeration

    7452283 in International System of Numeration

    7452283 named in International System of numeration

    7,452,283=Sevenmillionfourhundredfiftytwothousandtwohundredeightythree

  3. 99985102

    99,985,102=Ninetyninemillionninehundredeightyfivethousandonehundredtwo

    International System of numeration

    99985102 named in International System of numeration

    99985102 in International System of Numeration

    99985102 named in International System of numeration

  4. 48049831

    48049831 named in International System of numeration

    48049831 in International System of Numeration

    48049831 named in International System of numeration

    48,049,831=Fortyeightmillionfortyninethousandeighthundredthirtyone

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