Addition and Subtraction

1
Addition and Subtraction
To add or subtract numbers written in scientific
notation, you must.express them with the same
power of ten.
Sample Problem Add (5.8 x 103) and (2.16 x 104)
Solution Since the two numbers are not
expressed as the same power of ten, one of the
numbers will have to be rewritten in the same
power of ten as the other. 5.8 x 103 .58 x
104 so (.58 x 104) (2.16 x 104) ?
Answer 2.74 x 104
LARS
2
For Adding and Subtracting in Scientific Notation

• Exponents
• Must
• Be
• the
• Same

3
Foldable Example 1

• (4.5 x 107) (2.5 x 107)

4
Foldable Example 2
LARS

• (4.5 x 107) (2.5 x 108)

5
Foldable Example 3

• (8.7 x 105) (4 x 105)

6
Foldable Example 4
LARS

• (8.7 x 105) (4 x 103)

7
Adding and Subtracting
LARS

• (6.2 x 103) (1.3 x 103)
• (3.4 x 10-2) (4.6 x 10-1)
• (7.2 x 108) (2.3 x 107)

• 4) (6.2 x 103) - (1.3 x 103)
• 5) (5.8 x 10-2) - (4.6 x 10-1)
• 6) (7.2 x 108) - (2.3 x 107)