1.2 Reading and writing whole numbers

Read 42958.

1. Beginning at the right, we can separate this number into distinct periods by inserting a comma between the 2 and 9.
   42,958
2. Beginning at the left, we read each period individually:
   
   
   Forty-two thousand, nine hundred fifty-eight.

Read 307991343.

1. Beginning at the right, we can separate this number into distinct periods by placing commas between the 1 and 3 and the 7 and 9.
   307,991,343
2. Beginning at the left, we read each period individually.
   
   
   
   Three hundred seven million, nine hundred ninety-one thousand, three hundred forty-three.

Read 36000000000001.

1. Beginning at the right, we can separate this number into distinct periods by placing commas. 36,000,000,001
2. Beginning at the left, we read each period individually.
   
   Thirty-six trillion, one.

Seven thousand, ninety-two.

Using the comma as a period separator, we have

7,092

Fifty billion, one million, two hundred thousand, fourteen.

Using the commas as period separators, we have

50,001,200,014

Ten million, five hundred twelve.

The comma sets off the periods. We notice that there is no thousands period. We'll have to insert this ourselves.

10,000,512