!!! HELP QUICKLY PLEASE !!! 40 POINTS!

Find the correct standard form for the expanded forms listed.
A. 500 + 20 + 5 + 0.3 + 0.04
B. 10 + 2 + 0.8 + 0.006
C. 7 + 0.2 + 0.09 + 0.004
D. 30 + 1 + 0.5 + 0.02

All you need to do is answer the questions you don't have to explain the answers, answer all of the questions for brainiest, full star, and of course a thanks!!!