Chapter 3

Names of the Base Ten Units. The names for our base 10 units are cyclic, with a special name for every third power of 10. Thus we have . 1 thousand = 1000 ones, 1million =1000 thousands, 1 billion = 1000 millions, etc. We also write commas between every three digits in a compound numeral because of this system. one ten hundred ................
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