Review of Introductory Mathematics
DECIMALS
Example:
0.056 x 0.032 =
Solution:
0.056
0.032
112
168
0.001792
NOTE:
Since 0.056 has three digits to the right of the decimal point, and 0.032 has three
digits to the right of the decimal point, six digits must be to the right of the
decimal point in the product. To have six digits in the product, zeros are inserted
to the left of the computed digits.
To multiply a decimal by 10, move the decimal point one position to the right.
Example:
0.45 x 10 = 4.5. Similarly, when multiplying a decimal by 100, 1000, and 10,000,
move the decimal point to the right the same number of zeros that are in the
multiplier.
Example:
0.45 x 100 = 45
0.45 x 1000 = 450
0.45 x 10,000 = 4500
The reverse is true when multiplying by fractions of 10.
0.45 x 0.1 = 0.045
0.45 x 0.01 = 0.0045
0.45 x 0.001 = 0.00045
0.45 x 0.0001 = 0.000045
Dividing Decimals
When solving problems involving division of decimals, the following procedure should be
applied.
Step 1:
Write out the division problem.
Step 2:
Move the decimal in the divisor to the right.
Rev. 0
Page 43
MA-01
