•101 = 10
•102 = 100
•103 = 1,000 (one thousand)
•106 = 1,000,000 (one
million)
•
•You can think of this as raising 10 to some power
–
or just think of it
as moving decimal place over some given number of steps.
Think of computer speeds and disk space.
•
•100 = 1
•10-1 = 0.1 = 1 / 10
•10-2 = 0.01 = 1 / 100
•10-3 = 0.001 = 1 / 1,000
•10-6 = 0.000001 = 1 / 1,000,000
•
•How to write numbers which are not powers of
10:
1 A.U. = 149,597,900 km = 1.496 ´ 108 km
= mantissa ´ 10exponent