Method of memorizing multiplication formula quickly: \xd\① Understand the meaning of multiplication formula first, find the law of multiplication table, and then guide it. \xd\② Memorize two 2-digit numbers and five 5-digit numbers, so you can memorize multiplication formulas of 2 and 5 first with this bedding, and then adopt the same method for the rest. \xd\③ After memorizing, you can practice. \xd\④ Play games such as "password" and "finding friends" to increase interest and improve the proficiency and speed of formula.