Medium difficulty. New Observations on Junior High School Mathematical Thinking is a mathematics textbook, which contains many basic questions, but it is more difficult than ordinary simple questions, and there are also some difficult questions to improve students' mathematical thinking, but compared with the mathematics questions with high difficulty coefficient, these questions have medium difficulty coefficient. Just suitable for consolidating knowledge, but if you want to do advanced questions, this workbook is a bit insufficient. Therefore, the new observation of mathematical thinking in junior high school is a workbook with moderate difficulty.