20 PTS TO ANSWER THIS!!!!!! Question: Describe and correct the error in finding the value

Answer:
27. Where the 39 is it needs to be 390. The correct answer is 663.
28. You would have to bring down the 0 after you do 13-12=1, this would be 10 and 12 can't go into to 10. So you would have to put a zero on top. The correct answer is 109.