口算也称心算,是一种不借助计算工具,只依靠记忆、思维和语言进行计算直接得出结果的一种计算方法和方式,它具有快速、灵活的特点。在实际教学中,教师训练口算的方法多种多样,比如强调算理、视听算结合、口算常规练习等等。而笔者关注更多的则是学生的课堂直言,语言是思维的外在表现,通过对语言的关注,可以看到学生思考的愉悦、智慧的生成。直言,其实也是学生的心灵顿悟。以下是笔者在教学苏教版第五册整百数乘一位数 Mouth arithmetic is also called mental arithmetic, which is a kind of calculation method and method which directly draws the result without calculation tools, only relying on memory, thinking and language to calculate. It has the characteristics of fastness and flexibility. In the actual teaching, the teacher training mouth calculation methods varied, such as emphasis on arithmetic, audio-visual calculation, oral calculation routine and so on. The author is more concerned about the students’ classroom blunt language is the external manifestation of thinking through the language of concern, you can see the joy of student thinking, the generation of wisdom. To be blunt, in fact, the student’s mind epiphany. The following is the author in the Teaching of Soviet version of the fifth book by one hundred number by one digit