In this section, you´ll learn how to identify the properties of
multiplication and addition and how you can use identification to
help solve mathematical problems.
To solve rather hard problems without using a calculator you
have to identify all expressions that have the same operation.
In this example, you can add in any order you prefer. The sum of
the expression will not change if you prefer to add the numbers in
a different order.
The same is true for multiplication:
Video lesson: Show that the following equation