Multiplication table diagram contains multiple sets of colored cards. On the left side of the card, there are multiplication equations listed, and on the right side, there are blank multiplication equation fill in cells. In teaching, students can first memorize the multiplication result through the left card, and then independently complete the same equation in the blank space on the right, achieving a learning loop of "memory application". Cards of different colors can correspond to different multiplier ranges, making it convenient for classification practice. This teaching tool is suitable for multiplication teaching in the lower grades of primary school, transforming abstract multiplication formulas into operable card exercises to help students consolidate multiplication operations and cultivate independent problem-solving abilities.