** A Quick Review: EXPONENTS WORK LIKE THIS:**

**10 ^{1 }**

**equals 10**

**10 ^{2 }**

^{ }**equals 100**

**10 ^{3 }**

^{ }**equals 1000**

**….**

**10 ^{7 }**

**equals 10,000,000**

** See the pattern? Just count the zeros to get the “raised little number,” or superscript, or exponent. Why ever do this? Simply because it’s much easier to write enormously large numbers this way. **Here’s a bit more, if you want it. We call this writing numbers in the “power of 10s.” If we want to write, say, “60” in powers of 10 we could write it like this: **6 X 10 ^{1}**, or write “600,000” as

**6 X 10**or write “6,000,000,000” (or 6 billion) as

^{5 },**6 X 10**. Don’t be put off by numbers like this. Sometimes they’re real handy.

^{9 }Why put this post in here at this point? Coming up will be some posts that have very large numbers. Your screen may not be wide enough to write them the old, ordinary way. Well…not quite. But when typing a lot of zeros it’s easy to lose count.

** **

Ok. Cratchie will use his imagination.

Cratchie wants to know how one would write

.00000656.6.56 X 10 (with an exponent of minus 6) Unfortunately, we have to say it this way because we’ve discovered the hard way that “replies” and “archives” in posting are often ignorant of exponents and still use kindergarten math.