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

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Q-1 Fill in the blanks:

  1. 1 lakh ____________ ten thousand

  2. 1 million ____________ hundred thousand

  3. 1 crore ____________ lakh

  4. 1 crore ____________ million

  5. 1 million ____________ lakh

Solution:

Refer the following table to understand the Indian system and how it is converted to International system of numbering.

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

  1. 1 lakh 10(=101) ten thousand

    ( 1lakh=1,00,000 And tenthousand=10,000 )

    So, 10,000×10=1,00,000=1lakh

    Ten thousand and lakh written in words and powers of 10

    Ten Thousand and Lakh in 10s

    Ten thousand and lakh written in words and powers of 10

  2. 1 million 10(=101) hundred thousand

    ( 1million=10,00,000 And 1hundredthousand(lakh)=1,00,000 )

    Million and hundren thousand written in words and powers of 10

    Million and Hundrend Thousand in 10s

    Million and hundren thousand written in words and powers of 10

    So, 1,00,000×10=10,00,000

  3. 1 crore 100(=102) lakh

    ( 1crore=1,00,00,000 And lakh=1,00,000 )

    Lakh and crore written in words and powers of 10

    Lakh and Crore in Powers of 10

    Lakh and crore written in words and powers of 10

    So, 1,00,000×100=1,00,00,000

  4. 1 crore 10(=101) million

    ( 1crore=1,00,00,000 And million(tenlakh)=10,00,000 )

    1 crore and million written in words and powers of 10

    1 Crore and Million in Powers of 10

    1 crore and million written in words and powers of 10

    So, 10,00,000×10=1,00,00,000

  5. 1 million 10(=101) lakh

    ( 1million=10,00,000 And lakh=1,00,000 )

    1 million and lakh in words and powers of 10

    1 Million and Lakh in Powers of 10

    1 million and lakh in words and powers of 10

    So, 1,00,000×10=10,00,000

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