Scientific Notation
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Scientific Notation II
Astronomers rely on scientific notation in
order to work with 'big' things in the universe. The
rules for using this notation are pretty straight-
forward, and are commonly taught in most 7th-
grade math classes as part of the National
Education Standards for Mathematics.
The following problems involve the addition
and subtraction of numbers expressed in Scientific
Notation. For example:
8
6
6
6
1.34 x 10
+ 4.5 x 10
= 134.0 x 10
+ 4.5 x 10
6
= (134.0 + 4.5) x 10
6
= 138.5 x 10
8
= 1.385 x 10
14
12
1)
1.34 x 10
+ 1.3 x 10
=
-17
-18
2)
9.7821 x 10
+ 3.14 x 10
=
3
2
3)
4.29754 x 10
+ 1.34 x 10
=
25
22
24
4)
7.523 x 10
-
6.32 x 10
+ 1.34 x 10
=
-67
-65
5)
6.5 x 10
-
3.1 x 10
=
11
13
6)
3.872 x 10
-
2.874 x 10
=
-15
-17
7)
8.713 x 10
+ 8.713 x 10
=
2
-1
8)
1.245 x 10
- 5.1 x 10
=
137
135
136
9)
3.64567 x 10
- 4.305 x 10
+ 1.856 x 10
=
4
2
-1
10)
1.765 x 10
- 3.492 x 10
+ 3.159 x 10
=
Weekly Math Problems
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