变题教学可巩固基本技能、拓宽知识面、深化所学知识、提高思维灵活性、收到触类旁通的功效。对某些问题,只变一处(如一字、一数、一符号等),同样可以达到上述效果。现例析如下: 1 只变一字 只变一字,是指把原题目中某个关键字换成另一个字,而得到一道与原题意相近或 Variant teaching can consolidate basic skills, broaden knowledge, deepen knowledge learned, improve thinking flexibility, and receive comprehension by analogy. For some problems, only change one place (such as a word, a number, a symbol, etc.), can also achieve the above effect. Examples are as follows: 1 Only change one word Only change one word means to replace one keyword in the original title with another, and get a similar meaning to the original question or