CH 104: Lesson 1a

Significant Digits Pretest

Two important aspects of significant digits (or significant figures) are dealt with in this pretest: (1) determining the number of significant digits in a written value and (2) rounding off calculated values to the appropriate number of significant digits.

Two additional aspects are included in the course content: (3) the general concept of significant digits as it relates to precision and (4) how to record a measured value using the correct number of significant digits (next lesson).

1.   0.0507 has how many significant digits?

a.  1
b.  2
c.  3
d.  4
e.  5

2.   2000 has how many significant digits?

a.  1
b.  2
c.  3
d.  4

3.   The number 10.10 has how many significant digits?

a.  1
b.  2
c.  3
d.  4

4.   5.300 / 3.1 =

a.  1.7
b.  1.71
c.  1.710
d.  1.7097
e.  2

5.   11.1 x 0.8 =

a.  8.
b.  8.8
c.  8.88
d.  8.9
e.  9.

Answers

1.  c.
2.  a.
3.  d.
4.  a.
5.  e.

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