MULTIPLYING DECIMALS. Decimals are multiplied just as whole
numbers are, except you have to put a decimal in the final answer
4 12 10
(product). Unlike adding and subtracting decimals, however, you do not
need to keep the decimals lined up (aligned) nor do you have to add
zeroes to make the number of decimal places equal.
Sample problem: 1.11 x 0.15
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Multiply just as you do in whole numbers.
(Ignore the decimal for now.)
NOTE: Normally, no space is left under
the decimal when working a
Now, you need to place the decimal point in the answer. To do this, you:
(1) Count the number of digits to the right of the decimal point in
the top factor (multiplicand),
(2) Count the number of digits to the right of the decimal point in
the bottom factor (multiplier),
(3) Add the results together,
(4) Count off that many places from the RIGHT in the
PRODUCT (number at far right is one, number
immediately to its left is two, etc.) , and
(5) Place a decimal point to the left of that location.
In the example, the multiplicand (1.11) has 2 places to the right of the
decimal and the multiplier (0.15) has 2 places to the right of the decimal.
Adding the results (2 places + 2 places = 4 places) tells how many
decimal places (places to the right of the decimal) you have in the
produce. The answer then is
Place the DECIMAL POINT in
the product of this problem:
0.1665 (the answer must
have four decimal places to
the right of the decimal