Work the following problems. Be sure to place the decimal point
correctly in the product.
15.15207 (the multiplicand
NOTE: If there are not enough digits in the product, put zeros to the left
has 3 decimal places and
of the product until you have enough digits to place the decimal.
the multiplier has 2
Normally, you will also put another zero to the left of the decimal to
indicate that there are no whole numbers.
3 + 2 = 5, so the product
must have five decimal
places to the right of the
. A very important rule
by a decimal
that the divisor must be "changed" into a whole number before division is
started. This is done by moving the decimal point in the divisor all the
a. 0.0035 (4 places)
way to the right (that is, make the divisor a whole number).
x 3.28 (2 places)
0.011480 (6 places)
For example: 0.25 /
by moving the decimal two
places to the right. In reality, you have just multiplied the divisor by 100.
(Note: When an answer
In order to offset this change, you must multiply the dividend by 100 also.
has a zero in the last
To do this, move the decimal in the dividend the SAME NUMBER of
decimal place, the zero is
places to the right. Add zeros to the dividend as needed.
often dropped -- 0.01148)
For example: 0.25 / 1.25 becomes 25./ 125.
b. 22.222 (3 places)
x 0.11 (2 places)
If you prefer, think of the problem as a fraction in which the denominator
2.44442 (5 places)
must be changed to a whole number.
Rewrite the following problems to remove the decimal in the divisor.
3.3 / 0.066
0.0033 / 66
0.000033 / 0.0066