Writing a number in digits, every period after the first must always hold:
AThree places
BThree commas
CThree periods
DThree symbols
Answer & Solution
Correct answer: A. Three places
1. Periods are built from groups of three digits.
2. Only the leading period may be shorter.
3. So each later period holds three places.
_Source: OpenStax Prealgebra, Chapter 1, Whole Numbers._
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