Page 14 - Start Up Mathematics_5

Example 7: Write 105020540 in the International place value chart and then write its
number name.

Solution: Separating the number into three periods, it may be written as 105,020,540.

MILLIONS THOUSANDS ONES

HM TM M HTh TTh Th H T O

1 0 5 0 2 0 5 4 0

Number name: One hundred five million twenty thousand five hundred forty

Comparing Indian and International System of Numeration

Upto ten thousands, both systems follow the same place value names. However, after ten
thousands the names change as shown.

Indian system International system

• Ones period has 3 • All periods have 3 places. Indian International
places, thousands, system system
lakhs and crores have 2
places each. 1 lakh = 100 thousands
10 lakh = 1 million
• Starting from the • Starting from the
extreme right, put extreme right, put 1 crore = 10 million
commas after the 3rd, commas after the 3rd, 10 crore = 100 million
5th and 7th digits. 6th and 9th digits.

Example 8: Write the given numbers and their number names in both Indian and
International systems of numeration.
(a) 1332542 (b) 40536781 (c) 805376299

Solution:

Number Indian system International system

1332542 13,32,542 1,332,542
Thirteen lakh thirty-two thousand five One million three hundred thirty-two
hundred forty-two thousand five hundred forty-two
40536781 4,05,36,781 40,536,781
Four crore five lakh thirty-six thousand Forty million five hundred thirty-six
seven hundred eighty-one thousand seven hundred eighty-one

805376299 80,53,76,299 805,376,299
Eighty crore fifty-three lakh seventy-six Eight hundred five million three
thousand two hundred ninety-nine hundred seventy-six thousand two
hundred ninety-nine

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