Class Notes NCERT Solutions for CBSE Students
INTERNATIONAL PLACE VALUE SYSTEM
The population of the United States of America is more than 300000000.
That is a 9-digit number which we will read as 30 crore (30,00,00,000) in the Indian system of numeration and as 300 million (300,000,000) in the international system of numeration.
The international system has three places for every period.
Word from
Three million, six hundred eighty-one thousand, four hundred ninety-five
Twenty-three million, six hundred eighty-one thousand, four hundred ninety-five
One hundred twenty-three million, six hundred eighty-one thousand, four hundred ninety-five
Billion
Numbers that go beyond nine digits can be expressed by extending the international place value system to the left of the hundred millions place. That goes to a new period called the billions period.
A billion is a very big number and difficult to imagine.
If you counted numbers one, two, three, up to one billion and used one second for every number you counted (in other words, when you reached the number sixty, one minute would have passed), then it would take you 31 years to reach the number one billion!
One billion seconds takes about 31 years.
One billion minutes takes about 1,903 years.
One billion hours takes about 114,077 years. {1000 million= 1 billion}
One billion days takes about 2,737,850 year.
The billions period has similar places as the other periods in the international place value system.
Comparing the Indian and the International Systems
Very nice!
Very good!