Grades 1-2 Video Solutions 2025-2025_1-2

Video Transcription

Problem number 15. There were three books on Mary's shelf as shown in the picture. First, Mary swapped the white book and the gray book. Then, Mary swapped the gray  book and the black book. How are her books arranged now? To solve this problem, we need to follow the process that's described in the question. First, the  books are in the order white, black, gray as shown in the picture. If we swap the white and the gray book, the resulting order will be gray, black, white. Now, if we  swap the gray and the black book, the resulting order will be black, gray, white. If we look at the pictures, this matches the order in picture D. So the answer is  D, black, gray, white.

Video Summary

Mary initially had her books ordered as white, black, and gray. First, she swapped the white and gray books, resulting in the order gray, black, white. Next, she swapped the gray and black books, leading to the new order of black, gray, white. Thus, the final arrangement of Mary's books is black, gray, white, which corresponds to picture D.