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1、【2020新】北师大版三年级数学下册1,【2020新】北师大版三年级数学下册1,课后作业,探索新知,当堂检测,课堂小结,三位数除以一位数商中间或末尾有0的除法(被除数中间或末尾没有0),北师大版三年级数学下册,课后作业探索新知当堂检测课堂小结三位数除以一位数商中间或末尾,计算下面各题。,你能都做对吗？,6033 8042 8804 9603 6066 6802,201,220,101,401,320,340,北师大版三年级数学下册,计算下面各题。你能都做对吗？ 6033,9 1 2,3,3,9,1,0,4,1 2,0,答：平均每个班卖了304元。,9123,304（元）,9003300,123
2、4,3003304,2,探究点1 异三位数除以一位数商中间或末尾有0的除法(被除数中间或末尾没有0),平均每个班卖了多少元？,北师大版三年级数学下册,9 1 23391041 20答：平均每个班卖了,5224,130（元）2（支）,答：平均每个班卖了130支笔，还剩2支。,学校用卖废品的钱买了522支笔，送给手拉手的乡村小学4个班的小朋友，平均每个班多少支笔，还剩几支？,5 2 2,4,4,1,3,1 2,2,2,1,0,北师大版三年级数学下册,5224130（元）2（支）答：平均每个班卖,1填一填。(1)计算3183时，可以这样想：先算3003()，再算()3()，最后算()()()。(2)
3、计算 时，当被除数十位上的数3 除以5，不够商1 时，可以商()占位，商是()。,106,6,100,6,18,100,107,0,小试牛刀（源于典中点）,北师大版三年级数学下册,1填一填。106610061810021070小试牛刀（源,1填一填。(3),十位上2除以7不够商1，要商()占位。,0,1,0,2,0,7,2,1,3,1,北师大版三年级数学下册,1填一填。3十位上2除以7不够商1，要商()占位。01,2用竖式计算。6126728782444364,102,104,206,109,北师大版三年级数学下册,2用竖式计算。102104206109北师大版三年级数学下,3填一填。,余数是
4、()，商的个位不够商1，要写()占位。,0,1,0,2,0,7,2,1,3,1,2,北师大版三年级数学下册,3填一填。4余数是()，商的个位不够商1，要写(),4用竖式计算。6923842485459656,2302,2102,1704,1605,北师大版三年级数学下册,4用竖式计算。230221021704160,5选择。(将正确答案的字母填在括号里)(1)7545()A154B1504C154(2)下列各题，商的末尾有0的算式是()A5105B6004C8408(3)被除数的末尾有0，商的末尾()A一定有0B一定没有0C可能有0,B,B,C,北师大版三年级数学下册,5选择。(将正确答案的字
5、母填在括号里)BBC北师大版三年级,三位数除以一位数商中间有0的除法计算：三位数除以一位数当除到十位不够商1时，用0占位。三位数除以一位数商末尾有0的除法计算：三位数除以一位数当除到个位不够商1时，用0占位。,归纳总结：,（讲解源于点拨）,北师大版三年级数学下册,三位数除以一位数商中间有0的除法计算：三位数除以一位数当除到,1圈一圈，算一算。,夯实基础（教材P11练一练）,1 0 6 3 1 8 1 8 0,1 0 6 4 2 0 2 0 0,北师大版三年级数学下册,1圈一圈，算一算。3 1 834 2 04夯实基础,2乐乐全家去旅游，一共拍了412张照片，平均放在4本相册里，每本相册放多少张
6、？,4124103(张)答：每本相册放103张。,北师大版三年级数学下册,2乐乐全家去旅游，一共拍了412张照片，平均放在4本相册里,3.,6246,7045,8467,104,1044,1206,北师大版三年级数学下册,3.624670458467104104,6下面的计算对吗？不对的请改正。,（ ）,改正：,易错辨析（选题源于典中点）,北师大版三年级数学下册,6下面的计算对吗？不对的请改正。（ ）改正：,6下面的计算对吗？不对的请改正。,（ ）,改正：,6下面的计算对吗？不对的请改正。28 3 62,6下面的计算对吗？不对的请改正。,辨析：当十位不够除时，漏写商中间的0或忽略商末尾的0。,
7、（ ）,改正：,6下面的计算对吗？不对的请改正。辨析：当十位不够除时，漏写,5022,251,5 0 2,2,4,1,5,1 0,2,0,2,1,2,0,探究点 异分母分数加减法的计算方法,他们算的对吗？想一想，说一说。,50222515 0 224151 0202,3153,9608,8055,用竖式计算并验算。,315396088055用竖式计算并验算。,1填一填。(1)6033，商的最高位是()位，商是()。(2)一个数除以5，商是180，没有余数，则被除数是()。(3)可以用()( )( )来验算没有余数的除法的计算。(4)8 44，要使商的中间有0， 里最大应填()。(5)6 23，
8、要使商的中间有0且没有余数， 里应填( )。,百,3,被除数,除数,商,900,201,1,小试牛刀（源于典中点）,1填一填。百3被除数除数商9002011小试牛刀（源于典,2用竖式计算并验算。3262570373575084,163,190,105,127,(验算略),2用竖式计算并验算。163190105127(验算略),3连一连。,3连一连。,异分母分数相加减时，要先通分，化成同分母分数，再按照同分母分数加减法的计算方法进行计算。分数加减法的计算结果能约分的要约成最简分数或整数。,归纳总结：,（讲解源于点拨）,异分母分数相加减时，要先通分，化成同分母分数，再按照同分母分,4森林医生。,6
9、 8 0,2,6,4,8,0,8,3,0,8 1 6,4,8,4,1 6,0,1 6,2,0,7 2 7,7,7,0,7,0,7,1,1,2,3,2 1,6,夯实基础（教材P12练一练）,4森林医生。6 8 0264808308 1,5先计算，再验算。,6213,4324,8142,105,2 0 7 3 6 2 1,108,1 0 8 4 4 3 2,407,4 0 7 2 8 1 4,5先计算，再验算。62134324814210,5先计算，再验算。,9055,6306,6044,181,1 8 1 5 9 0 5,105,1 0 5 6 6 3 0,151,1 5 1 4 6 0 4,5
10、先计算，再验算。90556306604418,6填一填。,101,104,180,630,760,6填一填。101104180630760,7浇花。,三年级平均每班浇多少盆？请你再提出一个除法问题，并尝试解决。,3153105(盆),四年级平均每班浇多少盆？4804120(盆)(答案不唯一),7浇花。三年级平均每班浇多少盆？3153105(盆),7下面的计算对吗？不对的请改正。,（ ）,辨析：没有正确掌握三位数除以一位数的除法。,改正：,易错辨析,7下面的计算对吗？不对的请改正。（ ）辨析：没,版权申明本文部分内容，包括文字、图片、以及设计等在网上搜集整理.版权为个人所有This articl
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33、ant obligee. 转载或引用本文内容必须是以新闻性或资料性公共免费信息为使用目地地合理、善意引用，不得对本文内容原意进行曲解、修改，并自负版权等法律责任.Reproduction or quotation of the content of this article must be reasonable and good-faith citation for the use of news or informative public free information. It shall not misinterpret or modify the original intention
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35、地合法权利.除此以外，将本文任何内容或服务用于其他用途时，须征得本人及相关权利人地书面许可，并支付报酬.Users may use the contents or services of this article for personal study, research or appreciation, and other non-commercial or non-profit purposes, but at the same time, they shall abide by the provisions of copyright law and other relevant laws,
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