The hundred tables start from 1 to 100, and the fourth line starts from 3 1. The second number must be 32. The purpose of this question is to test the logical thinking ability of first-year students. If you don't think about it, students can easily blurt out "42", which is the wrong answer.

Baibiao is an introductory knowledge of first-grade mathematics, which aims to lay a solid foundation for primary school students and enable them to acquire certain logical thinking ability. These figures run through the whole six-year primary education, so it is very important for students to learn hundreds of watches.