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To multiply decimals .
Sixteen point one times
two point four.
First line up the numbers
.
Then multiplies though we
were multiplying whole numbers .
So we can think of this
problem .
As 161 times 24.
Now multiplying 4 times 1 is 4.
4 times 6 is 24 .
So we bring down a 4 and
carry the 2 .
4 times 1 is 4 plus 2 is 6.
Now starting a new row and beginning in the tens column .
We have 2 times 1 which
is 2.
2 times 6 which is 12 .
So we bring down a 2 and
carry the 1 .
2 times 1 is 2 plus 1 is 3.
Now we add the rows
together 4 plus 0 is 4 .
4 plus 2 is 6 .
6 plus 2 is 8 .
And we bring down the 3 so that we have 3860 for .
Our final step is to
determine where the decimal point goes in our final answer.
Notice that since there's one digit to the right of
the decimal point
and 16 point one and one digit to the right of the decimal point
in 2.4.
We have the total of two digits to the right of the decimal
point in our original numbers.
This means we'll have two digits to the right of
the decimal point in our final answer.
So 16 point one times two point four is thirty
eight point six four.
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