六 年制小学数学第五册第一单元“乘数是一位数的乘法”，是在学生已经熟练掌握表内乘法，能正确、迅速口算百以内数加减法的基础上进行教学的。本单元教材包括“口算乘法”和“笔算乘法”两部分。教材先安排口算乘法，再安排笔算乘法，这有利于学生以口算促笔算，同时，在学习 The first unit of the fifth year of elementary school mathematics in six years is multiplication by one digit, which is based on the students' proficiency in the table multiplication method, which can correct and promptly calculate the number of additions and subtractions in hundred. The unit teaching materials include “mouth multiplication” and “pen arithmetic” two parts. Teaching materials arranged by the mouth multiplication, and then arrange the pen calculation multiplication, which is conducive to students to recalcitrant calculations, at the same time, learning