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Then, she read the first number out loud, “Four hundred twenty-three million, one hundred seventy-six thousand, three hundred twenty-one.” Shannon noticed that there is a repeating pattern. Can you describe the pattern?
Each repeating core pattern is called a period on the Place Value Chart.
- The first three-digit group on the right is the ones period. It is made up of ones, tens, and hundreds.
- The second group is the thousands period. It is made up of thousands, ten thousands, and hundred thousands.
- The third group is the millions period. It is made up of millions, ten millions, and hundred millions.
When you say a number, you say each period just the way you do when you read a number in the ones period and then you add the name of the period. For example, to read Shannon's second number, say, “Forty-five million, two hundred eighteen thousand, seven hundred three.” When writing numbers, place a comma or a space between each period to make reading easier: 45,218,703.
Use the Writing Numbers in Words page in the Reference section as you answer the following questions.
Jacob found these numbers in the National Parks Gazette:
