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Numbers of Zeros

How many zeros in.....


I am often asked the question: How many 0s are in ______. Here is a quick list of numbers and how many 0s they have:

Ten: 10 (1 zero)
Hundred: 100 (2 zeros)
Thousand: 1000 (3 zeros)
Ten thousand 10,000 (4 zeros)
Hundred thousand 100,000 (5 zeros)
Million 1,000,000 (6 zeros)
Billion 1,000,000,000 (9 zeros)
Trillion 1,000,000,000,000 (12 zeros)
Quadrillion 1,000,000,000,000,000 (15 zeros)
Quintillion 1,000,000,000,000,000,000 (18 zeros)
Sextillion 1,000,000,000,000,000,000,000 (21 zeros)
Septillion 1,000,000,000,000,000,000,000,000 (24 zeros)
Octillion 1,000,000,000,000,000,000,000,000,000 (27 zeros)
Nonillion 1,000,000,000,000,000,000,000,000,000,000 (30 zeros)
Decillion 1,000,000,000,000,000,000,000,000,000,000,000 (33 zeros)

The number Googol (termed by Milton Sirotta) has 100 zeros after it, then there is the number Googolplex, a 1 followed by a googol of zeros.

This list goes on and on.

Place value refers to the placement of a number. For instance, take the number 14,537, the 1 represents one ten thousand, the 4 represents four one thousands, the 5 represents five one hundreds and the 3 represents three tens, the 7 represents seven ones. Place value often causes difficulty for many young learners. Without having an understanding of place value, it makes it difficult to move to the four operations (addition, subtraction, multiplication and division), especially when regrouping is involved. Some of the worksheets here may be useful.

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