Oh, dude, that's easy! 1200-thousandths in standard form is just 1.2. You can think of it like this - if you have 1200 pieces of a whole, that's the same as having 1.2 of that whole thing. So, yeah, it's just 1.2 in standard form.
Seven hundred forty-five and nine hundred twelve thousandths
Twelve hundred-thousandths.
11.00012
0.612
7.712
0.0712
12.103
40012000
It is 11.0012
twelve hundred-thousandths.
That is 0.112