Just me again. Is it true you are supposed to print/type out the words one thru ten instead of 1-10, when writing a letter or paragraph....or writing whatever???

THANKS!

Generally, yes. But I have found that in the publishing business it depends on the publisher's preferences. Some base the decision on what is being enumerated, rather than on the size of the number.

Thanks Minn

I agree with Minn. The common exception would be where space is limitted such as a newspaper. It would nearly always be spelled out if it were at the beginning of the sentence.

In anything formal enough to be worried about such things, I would use through instead of thru.

Without making too much of an issue about it, one thru (or through) ten is American English. In British English it's one to ten.

I've heard it used pretty much interchangeably; however in English class we were taught that one to ten may not necessarily include "ten," as in "one up to ten" (unless it was "one to ten, inclusive"); whereas one through ten included all ten numbers.

Good point, TIE.
My general rule is: spell everything. In my opinion, numbers look messy and unfinished. I generally try not to abbreviate, as well.
In professional writing, you should certainly write everything out. In casual writing, or where space is limited, abbreviating is fine.
Just remember to use the whole word (through) if you're going to use words for the rest of it.

Elexina,

I don't know where you got the idea that "in professional writing, you should certainly write everything out," because this is far from true. Here is just one style book's advice: (The Bedford Handbook For Writers).

1) Spell out numbers of one or two words or those that begin a sentence. Use figures for numbers that require more than two words to spell out.

2) Generally figures are acceptable for dates, addresses, percentages, decimals, scores, statistics and other numerical results, exact amounts of money, divisions of books, pages identification numbers and the time.

Minn, I thought we were talking about sentence structure, not addresses and other such numerical values.
I would write "one plus one is two" as opposed to "1+1=2" in professional writing because it looks better, but I would not write "February Third, Two Thousand Three." I would not use the & or @ symbols in professional writing, nor would I use the $ symbol or % symbol unless they were followed by a dollar amount or percentage.
I'm sorry that I wasn't specific enough. Your examples, though, are an excellent way of putting it.

TiE

An interesting point (that "one to ten" may not be inclusive). In British English it is inclusive, and we seem to manage OK.

If it wasn't inclusive, we couldn't have had the charming description of an actress's performance as "displaying the full range of human emotions from A to B"!