16. How to read
large numbers
Read the numbers before the comma
as if you were reading in the one’s
column.
Say the period you are in when you
get to the comma except for the one’s
period.
21. 1,874,304,039,270
one trillion, eight hundred seventy-four
billion, three hundred four million,
thirty-nine thousand,
two hundred seventy
Read this number
22. Writing Numbers In Words
When writing numbers in words you write
exactly what you say:
Four hundred nine million, three hundred
twenty thousand, one hundred ninety-nine
409 320 199
29. Writing Numbers In
Expanded Form
the value of a number using the face
value and place value of each digit
4856
4000 + 800 + 50 + 6
4 x 1000 + 8 x 100 + 5 x 10 + 6 x 1