Current location - Training Enrollment Network - Mathematics courses - What is the unit of counting, what is rank and what is rank?
What is the unit of counting, what is rank and what is rank?
Counting units are 10, 100, 1000, 10000, etc. The forward speed between these adjacent counting units is 10, and each level is 10, 1 10,000, 1 100,000, and each level has 10 digits.

Hundreds, thousands, tens of thousands, hundreds of thousands, millions, tens of millions, billions, billions, billions, billions.