*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,第六单元 大海边,100,以内的加减法(二),第六单元 大海边,1,学习目标,学会两位数加两位数的口算(不,进位)和笔算方法,并能正确进,行相应的计算。,会提出问题,并有解决问题的能,力,体验数学与生活的密切联系。,学习目标 学会两位数加两位数的口算(不会提出问题,并有解决,2,情景导入,根据这些信息,你能提出什么问题?,女孩捉了,12,只,男孩捉了,26,只,一共捉了多少只?,女孩捉了,11,只,男孩捉了,23,只,一共捉了多少只?,情景导入根据这些信息,你能提出什么问题?女孩捉了12只男孩捉,3,探索新知,一共捉了多少只?,26+12=,(只),探索新知一共捉了多少只?26+12,4,探索新知,26+12=,(只),一共捉了多少只?,20+10=30,6+2=8,30+8=38,38,探索新知 26+12=(只)一共捉,5,探索新知,一共捉了多少只?,26+10=36,36+2=38,26+12=,(只),38,探索新知一共捉了多少只?26+10=,6,探索新知,一共捉了多少只?,2 6,1 2,3,8,百,十,个,26+12=,(只),38,探索新知一共捉了多少只?2 61 2,7,探索新知,一共捉了多少只?,1 1,2 3,3,4,11+23=,(只),34,探索新知一共捉了多少只?1 1 2,8,典题精讲,回顾刚才的计算过程,想一想,用竖式计算应该注意什么?,用竖式计算,相同数位要对齐。,2 6,1 2,3,8,1 1,2 3,3,4,典题精讲回顾刚才的计算过程,想一想,用竖式计算应该注意什么?,9,易错提醒,6,8,6,8,7,6,8,9,错误解答,错误解答,易错提醒686876 8 9错误解答错误解答,10,易错提醒,6,8,6,8,7,6,8,9,错误解答,错误解答,错解分析:用竖式计算,相同数位要对齐。,易错提醒686876 8 9错误解答错误解答错解分析:用竖,11,易错提醒,6,8,6,8,7,6,8,9,正,确,解,答,易错提醒686876 8 9正,12,学以致用,1.,+,15,24,39,+,43,36,79,学以致用1.+152439+433679,13,学以致用,2.,连一连。,学以致用2.连一连。,14,学以致用,3.,填一填。,39,88,58,59,99,学以致用3.填一填。3988585999,15,学以致用,=,23 +16 39,(个),4.,学以致用=23 +16 39 (个)4.,16,课堂小结,口算时,可以先把两个整十数相加,,再把两个一位数相加。,用竖式计算,相同数位要对齐。,课堂小结口算时,可以先把两个整十数相加,用竖式计算,相同数位,17,9,、,春去春又回,新桃换旧符。在那桃花盛开的地方,在这醉人芬芳的季节,愿你生活像春天一样阳光,心情像桃花一样美丽,日子像桃子一样甜蜜,。,2024/11/17,2024/11/17,Sunday,November 17,2024,10,、,人的志向通常和他们的能力成正比例,。,2024/11/17,2024/11/17,2024/11/17,11/17/2024 7:26:16 PM,11,、,夫学须志也,才须学也,非学无以广才,非志无以成学,。,2024/11/17,2024/11/17,2024/11/17,Nov-24,17-Nov-24,12,、越是无能的人,越喜欢挑剔别人的错儿。,2024/11/17,2024/11/17,2024/11/17,Sunday,November 17,2024,13,、,志不立,天下无可成之事,。,2024/11/17,2024/11/17,2024/11/17,2024/11/17,11/17/2024,14,、,Thank you very much for taking me with you on that splendid outing to London.It was the first time that I had seen the Tower or any of the other famous sights.If Id gone alone,I couldnt have seen nearly as much,because I wouldnt have known my way about.,。,17 十一月 2024,2024/11/17,2024/11/17,2024/11/17,15,、,会当凌绝顶,一览众山小,。,十一月 24,2024/11/17,2024/11/17,2024/11/17,11/17/2024,16,、,如果一个人不知道他要驶向哪头,那么任何风都不是顺风,。,2024/11/17,2024/11/17,17 November 2024,17,、,一个人如果不到最高峰,他就没有片刻的安宁,他也就不会感到生命的恬静和光荣,。,2024/11/17,2024/11/17,2024/11/17,2024/11/17,谢谢观看,THE END,9、春去春又回,新桃换旧符。在那桃花盛开的地方,在这醉人芬芳,18,