1. Before adding or subtracting decimals,
the answer by
that are easier to mentally add or subtract.
2. When adding two decimals, line up the
the decimal point to find the correct
the decimals to numbers
3. When lining up decimals to add or subtract, it may be necessary
to annex one or more
as placeholders so
that each place has a
4. When subtracting two decimals, it may be necessary to
to find the correct
5. When multiplying two decimals, treat the
as
6. To place the decimal point in a
sum of the decimal places in the
at
, use the