六年级总复习鸡兔同笼应用题.pptx

,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,#,鸡兔同笼,总复习,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,解,:,设兔有,X,只,笼子里有若干只鸡和兔,.,从上面数,有,20,个头,从下面数,有,54,只脚,.,鸡和兔各有几只,?,那么兔有,解,:,设鸡有,X,只,那么鸡有,(20-X),只,.,4(20-X)+2X=54,(20-X),只,.,（一）,（二）,4X+2(20-X)=54,4x+40-2x=54,2x=54-40,X=13,鸡：,20-13=7,（只）,答,:,鸡有,13,只,兔有,7,只,.,1,、,方,程,解,法,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,现在共有,202=40,只脚,比实际的少,54,40=14,只脚,一只鸡比一只兔少,4-2=2,只脚,那么鸡就有,20,7=13,只,答,:,鸡有,13,只,兔有,7,只,.,笼子里有若干只鸡和兔,.,从上面数,有,20,个头,从下面数,有,54,只脚,.,鸡和兔各有几只,?,假设全部都是鸡,也就是有,142=7,只兔,2,、,假设法,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,假设法：假设全部是丹顶鹤（丹顶鹤,2,只眼睛，,2,只脚；猴子,2,只眼睛，,4,只脚）,462=23,（只）,23 2=46,（只）,72-46=26,（只）,26,（,4-2,）,=13,（只）,23-13=10,（只）,答：,猴子,13,只，丹顶鹤,10,只。,动物园里饲养一群丹顶鹤和一群猴子,数眼睛共只，数脚共只，,丹顶鹤和猴子各有多少只？,活动三：练一练,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,我们班,41,名少先队员去儿童公园划船，共租了,8,条船，恰好坐满，每条大船坐,7,人，每条小船坐,4,人，问大船,和小船各租了几条？,练一练,2,：,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,练习三：,某学校举行数学竞赛，每做对一题得,9,分，做错一题倒扣,3,分。共有,12,道题，王刚得了,84,分。王刚做错了几题？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,数学竞赛，小明共做,20,道题，做对一道题得,5,分，没做一道或错一道都要扣,3,分。小明得,60,分，问他做对几道题？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,鸡和兔共,100,只，鸡的脚数比兔的脚数多,80,只，问鸡兔各多少只？,鸡和兔共,40,只，鸡的脚数比兔的脚数少,70,只，问鸡兔各多少只？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,工人运花瓶,250,个，规定完整运一个到达目的给运费,20,元，损坏一个要赔,100,元。运完这批花瓶后，工人共得,4400,元，问损坏了几个花瓶？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,松鼠妈妈采松果，晴天每天采,20,个，雨天每天只能采,12,个，它一连几天采,112,个松果，平均每天采,14,个。问这几天有几个雨天？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,1.,鸡兔同笼，鸡兔共,35,个头，,94,条腿，问鸡、兔各多少只？,2.,鸡兔同笼，头共,20,个，足共,62,只，求鸡与兔各有多少只？,3.,在一个停车场上，停了汽车和摩托车一共,32,辆。其中汽车有,4,个轮子，摩托车有,3,个轮子，这些车一共有,108,个轮子。求汽车和摩托车各有多少辆？,4.,小华买了,2,元和,5,元纪念邮票一共,34,张，用去,98,元钱。求小华买了,2,元和,5,元的纪念邮票各多少张？,5.,全班,46,人去划船，共乘,12,只船，其中大船每只坐,5,人，小船每只坐,3,人，求大船和小船各有多少只？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,1.,鸡兔同笼，鸡比兔多,15,只，鸡兔共有脚,132,只，问鸡兔各多少只？,2.,鸡兔同笼，鸡兔共,40,个头，鸡脚比兔脚共多,32,只，问鸡兔各多少只？,3.,鸡兔同笼，鸡比兔多,10,只，但鸡脚却比兔子少,60,只，问鸡兔各多少只？,4.,鸡兔同笼，鸡比兔多,10,只，鸡脚比兔脚多,10,只，问鸡兔各多少只？,5.,张大妈家养的鸡比兔多,13,只，兔足比鸡足少,16,只，求鸡兔各有多少只？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,小结与收获,1,：经过本节课的学习，你有那些收获？,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,再见,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,