Nemeth section 64 defines a mixed number as "... an expression which begins with a numeral and is followed, usually in smaller type, by a simple fraction whose numerator and denominator are both numerals. ... An expression is not a mixed number if it contains any letter ..."
I have 10 followed immediately by a fraction whose numerator is square root of 2 and whose denominator is 2.
The square root sign and termination indicator are confusing me. The definition mentions the exclusion of letters, but not of other symbols.
Yes, this expression is a mixed number as the Nemeth code defines one. You can see examples of a radical in the numerator of a *simple fraction in the lesson book, page 116, example (10) in Section 83.b. Yours will use mixed number fraction indicators instead of simple fraction indicators.