Exponential Notation:
Addition and Subtraction
Before adding or subtracting
two numbers written in scientific
notation, it is necessary to express both numbers to the same power of ten.
(9.922 x104)
+
( 8.0 x 101)
x 10
0
Now the factors may be added in
the normal fashion.
(9.992 x104)
+
( .0080 x 104)
Giving:
(10.000 x104)
(1.0000 x105)
.
Change
all exponents to be equivalent to the largest exponent found in the factors given.
Adding
to the exponent is equivalent to
moving the decimal point to the
left
8
•
0
1
+
1
•
2
•
3
•
0
4