1-15. DIVIDING DECIMALS BY MULTIPLES OF 10
a. If a decimal is to be divided by a multiple of ten (10, 100, 1000, and so forth),
move the decimal point as many places to the left as there are zeroes in the divisor.
b. For example: When dividing 0.2 by 100, move the decimal point one place to
the left for each of the zeros in the divisor (the number you are dividing into the other
number). There are two zeros, therefore, we move the decimal two places to the left.
Examples:
5 l0
1.8 10
(1)
=
0.5
(4)
= 0.18
5 100 =
1.8 100 = 0.018
(2)
0.05
(5)
5 1000 =
1.8 1000 = 0.0018
(3)
0.005
(6)
c.
Work the following problems:
6.2 100
12.324 100
(1)
=______
(6)
=______
20 10
65 1000
(2)
=______
(7)
=______
4.3 1000
0.025 10
(3)
=______
(8)
=______
0.08
1.34 1000
(4)
100
=______
(9)
=______
0.7
65.0 100
(5)
10
=______
(10)
=______
Answers: (1) 0.062
(4) 0.0008 (7) 0.065
(10) 0.65
(2) 2
(5) 0.07
(8) 0.0025
(3) 0.0043
(6) 0.12324 (9) 0.00134
d.
Example problems.
(1)
If a pharmacy specialist is to make 1000 capsules of a drug with each
capsule containing 0.005 grams of the drug, how many grams of the drug would he
use?
Answer: __________grams
MD0802
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