5.034
It is already in standard form as written.
34
"Standard" form has different meanings in different countries. 34/100 = 0.3 + 0.04 or 3.4*10-1
34 304/100000
34 and 304/1000 or 34.304
34
-34 is an integer, not a fraction.
34,000,000
34+127
34.12
The standard form is: 3,456
34 and thirty-four