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ID:38390287
大小:1.22 MB
页数:44页
时间:2019-06-11
《人教版小学六年级上册分数乘法第一课时》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第二章:分数乘法1.分数乘法第一课时Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.看图写算式。()()()()()()()()()+=×=×=?22Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.练一练:+++=()()
2、×++++……100个=()()×294715100Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.例1:人跑一步的距离相当于袋鼠跳一下的。人跑三步的距离是袋鼠跳一下的几分之几?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLt
3、d.例1人跑一步的距离相当于袋鼠跳一下的,人跑3步的距离是袋鼠跳一下的几分之几?211211?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.1只树袋熊一天大约吃千克的桉树,1只树袋熊3天大约能吃多少千克桉树叶?练习Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2
4、004-2011AsposePtyLtd.1只树袋熊一天大约吃kg的桉树叶。10只树袋熊一星期大约吃多少kg的按树叶?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.算一算Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.5
5、2试一试:×492×498×36×32×315155215231552×Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.分数和整数相乘,用分数的分子和整数相乘的积作分子,分母不变。分数和整数相乘法则:注意:能约分的可以先约分。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyr
6、ight2004-2011AsposePtyLtd.()()()()()()()+×=×=43++++看一看Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.分数乘整数的意义是什么?分数乘整数的意义与整数乘法的意义相同,就是求几个相同加数和的简便运算。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5
7、.2.0.0.Copyright2004-2011AsposePtyLtd.1、一堆沙,每次运走吨,4次共运走多少吨?182、一堆沙,每次运走,4次共运走几分之几?18试一试Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.×33、先说算式意义,再计算:4××59×Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientP
8、rofile5.2.0.0.Copyright2004-2011AsposePtyLtd.通过今天的学习,你有什么收获?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2
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