Lizzy: There are 336 books in a library. On Monday, 124 books are taken out. On Tuesday, 22 books are brought back. How many books are there now?.
Me: Hmmm, let me think. I think this is the detailed solution:
At the end of Monday, there are 336 - 124 = 212 books left. At the end of Tuesday, there are 212 + 22 = 234 books. Final answer: 234.