Answer: Ones (units) period.
Explanation: Periods group digits in threes from the right. The rightmost period (ones or units) contains the first three digits; a three-digit number 913 sits in that ones (units) period.
Answer: Ones (units) period.
Explanation: Periods group digits in threes from the right. The rightmost period (ones or units) contains the first three digits; a three-digit number 913 sits in that ones (units) period.
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