Understanding 100 Million

100 million is a nine-digit number: a 1 followed by eight zeros

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About This Practice

One hundred million is a nine-digit number โ€” and a brand-new counting unit. This practice shows the full place-value chart of 100000000: from ones and tens all the way to the hundred-millions place. Tap each digit to see which period it belongs to and feel just how big 100 million is.

How big is 100 million? Tap through the place-value chart of 100000000, meet the hundred-millions place, and see how digits group into periods.

EasyEstimated Time: 10minhundred millionsplace valuelarge numbersbasics

How to Play

  1. Read the place-value chart from right to left: ones, tens, hundreds, thousandsโ€ฆ
  2. Find the hundred-millions place on the far left: in 100000000 it holds a 1 followed by eight zeros.
  3. Tap each digit to see which period it belongs to โ€” ones, thousands or millions.
  4. Count the digits: how many digits does 100 million have?
  5. Think it over: how many ten-millions make one hundred million?

Learning Objectives

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