Where do we put the "and" when writing a number, 1234.567 for example, in words?

Some references say, "one thousand two hundred and thirty-four point five six seven. Other references say, "one thousand two hundred thirty-four and five hundred fifty-six thousandths.

Grammar is generally about what 'sounds' and 'feels' right. The first one is probably the better of the pair.

I disagree with that statement about grammar. We often say things incorrectly.

Both are ok. The second one sounds more like you know what you are saying. I would go with that one.

The second is better, yes. The "and" usually is there to indicate where the decimal is if you write the numerals.

(Tatiana is in trouble if she depends on "what 'sounds' and 'feels' right." Yikes!)

When writing a number in words, the placement of the word "and" depends on the specific writing style or regional conventions. Both variations you mentioned are acceptable, but they may be used differently in different parts of the world. Let's break it down:

The number 1234.567 can be written as "one thousand two hundred and thirty-four point five six seven" or "one thousand two hundred thirty-four and five hundred fifty-six thousandths".

In the first variation, "and" is placed before the word "thirty-four" and after the word "hundred". This style is commonly used in British English and some other English-speaking countries.

In the second variation, "and" is placed before the word "thirty-four" and after the word "hundred", but it is also used before "five hundred fifty-six thousandths". This style is more commonly used in American English.

To decide which style to use, you can consider the language conventions or preferences in your region, or follow a specific style guide or manual that specifies the rules for writing numbers in words. It's important to be consistent within a document or context to maintain clarity and avoid confusion.