d. **Powers of Ten (10) Expressed in Scientific Notation**.

1,000,000 = 1 X 106

100,000 = 1 X 105

10,000 = 1 X 104

decimal moved to the left

1,000 = 1 X 103

100 = 1 X 102

10 = 1 X 101

1 = 1 X 100

------------------------------------------

0.1 = 1 X 10-1

0.01 = 1 X 10-2

0.001 = 1 X 10-3

decimal moved to the right

0.0001 = 1 X 10-4

0.00001 = 1 X 10-5

0.000001 = 1 X 10-6

a. To change the sign of the exponent, move the exponential term to the

denominator or numerator as appropriate with a concurrent change in sign. This

procedure yields an equivalent expression.

Example.

10-6

10-4

Numerator

---- = ---- = 10-10

104

106

Denominator

MD0837

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