Lessons and Worksheets

LESSON 2
Other Symbols
The @ symbol is sometimes used in math
problems. To say that we have 4 items at 10¢
each, we write: 4 @ 10¢. In math, if you use the
word at, you may use this symbol. This symbol
is also used in Web addresses.
A symbol for the word number is #. It’s really
a shorthand symbol. I can write the number four,
or I can write #4. It’s a short way to write the
word number. This same symbol is sometimes
used to mean pounds. We write that the
computer weighs 15#. If the symbol is before a
number, it means number. If it follows a
number, it means pounds.
#10 number 10
10# 10 pounds
Applied Mathematics • 27