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3.9的乘法口诀,课程讲授,新知导入,知识应用,随堂练习,第,6,章 表内乘法（二）,新知导入,试一试,算一算，比一比谁做得又快又好,!,84,64,65,82,76,38,81,37,5,（ ）,20,7,（ ）,56,32,30,42,8,24,16,4,24,21,8,课程讲授,做一做：,数一数，填一填。,27,36,45,54,63,72,81,课程讲授,根据刚刚填写的内容，你能总结出,9,的乘法口诀吗？,想一想：,27,36,45,54,63,72,81,一九得九,二九,( ),三九,( ),四九,( ),五九,( ),六九,( ),七九,( ),八九,( ),九九,( ),十八,二十七,三十六,四十五,五十四,六十三,七十二,八十一,课程讲授,做一做：,请把,9,的乘法口诀的得数圈出来。,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,课程讲授,仔细观察这些得数，你有什么新发现吗？,想一想：,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,课程讲授,想一想：,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,相邻的每句口诀的积之间相差,9,。,积的个位、十位上的数相加的和都是,9,。,得数个位上的数逐渐少,1,、十位上的数逐渐多,1,。,知识应用,算一算。,1,2,9,6,9,7,9,9,9,18,54,63,81,知识应用,填一填。,2,9,只脚踏船最多可坐多少人？,（人）,9,3,27,随堂练习,1,连一连。,随堂练习,2,填一填。,7,6,42,6,7,42,9,7,63,随堂练习,3,数一数，填一填。,9,5,45,米,课堂小结,同学们，通过今天的学习，你有什么收获？,我,知道了,
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