CH 104: Lesson 1a

Home Up Metric System Pretest Scientific Notation Pretest Significant Digits Pretest

 

Scientific Notation Pretest

Three aspects of scientific notation are addressed in this pretest: (1) converting a regular number into scientific notation, (2) converting a number from scientific notation into regular notation, and (3) doing calculations using scientific notation.

1.   0.0057 is properly shown in scientific notation as

a.  57 x 104
b.  57 x 10-4
c.  5.7 x 103
d.  5.7 x 10-3
e.  5.7 x 10-4

2.   500.7 is properly shown in scientific notation as

a.  5007
b.  5007 x 10-1
c.  5.007
d.  5.007 x 102
e.  5.007 x 10-2

3.   2.3 x 104 is the same as

a.  0.000023
b.  0.00023
c.  2300
d.  23,000
e.  230,000

4.   3.2 x 10-1 is the same as

a.  0.032
b.  0.32
c.  3.2
d.  32
e.  320

5.   (7.1 x 107) x (1.2 x 10-5) =

a.  8.5 x 1012
b.  8.5 x 102
c.  8.5 x 10-2
d.  8.5 x 10-12
e.  8.5 x 10-35

6.   (2.1 x 10-8) x (1.7 x 103) =

a.  3.6 x 1011
b.  3.6 x 105
c.  3.6 x 10-5
d.  3.6 x 10-11
e.  3.6 x 10-24

7.   (5.0 x 107) / (2.0 x 1010) =

a.  2.5 x 10-10
b.  2.5 x 10-4
c.  2.5 x 10-3
d.  2.5 x 104
e.  2.5 x 1010
f.  2.5 x 1021

8.   (3.0 x 10-6) / (4.0 x 102) =

a.  7.5 x 10-9
b.  7.5 x 10-8
c.  7.5 x 10-7
d.  7.5 x 10-6
e.  7.5 x 10-3

9.   (2.0 x 102) x (3.0 x 103) / (4.0 x 104) =

a.  1.5
b.  1.5 x 101
c.  1.5 x 101.5
d.  1.5 x 102
e.  1.5 x 109

10.   (2.0 x 102) x (3.0 x 103) / (4.0 x 10-4) =

a.  1.5 x 10-3 
b.  1.5 x 101
c.  1.5 x 102
d.  1.5 x 109
e.  1.5 x 1010

 

Answers

1.  d.
2.  d.
3.  d.
4.  b.
5.  b.
6.  c.
7.  c.
8.  a.
9.  b.
10.  d.

 

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