d. Numbers that contain more than three nonzero digits should be rounded to
three significant figures.
e. Consider the following examples:
f. Examine the Appendix B, Table of Four-Place Logarithms. The table consists
of a series of columns and rows of four--digit numbers bordered left by a column of
two--digit numbers and uppermost by a row of single--digit numbers.
g. The first two digits of the natural number can be found in the first column.
h. The third digit of the number can be found in the uppermost row.
i. To determine the mantissa of a number, find the first two digits of the number
in the left column. Move across this row to the column headed by the third digit of the
j. The four - digit number at the intersection is the mantissa of the given natural
1-36. DETERMINATION OF THE LOGARITHM OF A NUMBER
To determine the logarithm of a number, both the characteristic and the mantissa
must be found. The characteristic must be determined by inspection (or rule), and the
mantissa must be looked up in a table of "common" logarithms (a calculator may also
be used). By close examination of the following table, the determination of the
logarithm of a number should become clear.