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A number is printed as 3,205,417. The commas in it serve to separate the:

ASymbols
BLetters
CPeriods
DAnswers
Answer & Solution
Correct answer: C. Periods
1. Large numbers are hard to read without breaks. 2. Each comma marks off a group of three digits. 3. So commas separate the periods. _Source: OpenStax Prealgebra, Chapter 1, Whole Numbers._
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