Lessons and Worksheets

LESSON 6
Notice I used a hyphen earlier to connect
sixty-eight. We use a hyphen to connect the
rightmost two digits of each set of numbers
between:
21 – 29
31 – 39
41 – 49
51 – 59
61 – 69
71 – 79
81 – 89
91 – 99
This is not easy to see at first. Let’s write
another number to see what I mean.
26,732
We write this as twenty-six thousand, seven
hundred thirty-two.
rightmost
hundred millions
ten millions
millions
hundred thousands
2 6 7 3 2
rightmost
ten thousands
thousands
hundreds
tens
rightmost
ones (units)
The digits 2 and 6 are the rightmost in the
set showing thousands, so we write twenty-six
thousand. The digits 3 and 2 are rightmost in
the set showing ones. We write seven hundred
thirty-two.
66 • Applied Mathematics
It is not correct to say or write the word and
between numbers.