人教版五年級數(shù)學上冊課件3小數(shù)除法第2課時除數(shù)是整數(shù)的小數(shù)除法課件

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1、除數(shù)是整數(shù)的小數(shù)除法（,2,）,人教版,五年級上冊,除數(shù)是整數(shù)的小數(shù)除法（2）人教版五年級上冊,12,16.,8,1.4,12,4 8,0,4 8,9.87,16.812,7,9.,8,1.4,7,2 8,0,2 8,商的小數(shù)點要和（）的小數(shù)點對齊。,被除數(shù),1.4,1.4,列豎式計算下面各題,一、復習導入,1216.81.4124 804 89.87,28,16,王鵬的爺爺計劃,16,天慢跑,28km,，平均每天慢跑多少千米？,二、探究新知,估一估，爺爺平均每天大約跑多少千米？,列式：,列豎式計算，你能試一試嗎？,2816王鵬的爺爺計劃16天慢跑28km，平均每天慢跑多,2 8,0,1 6,

2、1,1 2,7,0,16,添,0,繼續(xù)除，表示,120,個,（）分之一。,十,28,16,二、探究新知,那算式末尾的余數(shù),12,應該怎么辦,?,除到被除數(shù)的最后一位時為什么還可以添上,0,繼續(xù)除,?,1 1 2,8,0,0,添,0,繼續(xù)除，表示,80,個,（）分之一。,百,5,8 0,0,為什么商,7,要寫在十分位上,5,要寫在百分位上,?,1.75,（,km,）,答：平均每天慢跑,1.75km,。,2 8 01 61 1 27016添0繼續(xù)除，,2 8,0,1 6,1,1 2,7,0,16,添,0,繼續(xù)除，表示,120,個,（）分之一。,十,28,16,二、探究新知,1 1 2,8,0,0,

3、添,0,繼續(xù)除，表示,80,個,（）分之一。,百,5,8 0,0,1.75,（,km,）,答：平均每天慢跑,1.75km,。,計算除數(shù)是整數(shù)的小數(shù)除法要注意什么？,商的小數(shù)點要和被除數(shù)的小數(shù)點對齊；,如果有余數(shù)，要添,0,繼續(xù)除；,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,2 8 01 61 1 27016添0繼續(xù)除，,列豎式計算。,（,1,）,72,15,14.217=,25.5,6,4.8,4.25,7 2,15,4,6 0,1 2,.,0,.,0,8,1 2,0,0,2 5,.,

4、5,6,4,2 4,1,.,5,2,1 2,3,0,0,5,3 0,0,1 4,.,2,7,2,1 4,.,2,0,2 1,1,1,3,0,2.03,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,列豎式計算。（1）7215,王鵬計劃每周跑,5.6km,，平均每天要跑多少千米？,二、探究新知,5.6,7,列式：,估一估，王鵬平均每天大約跑多少千米？,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除

5、法課件,王鵬計劃每周跑5.6km，平均每天要跑多少千米？二、探究新知,5.6,7,二、探究新知,5.,6,7,5 6,8,0.,0,為什么要商,0,呢？,不夠商,1,，用,0,占位。,答：平均每天要跑,0.8km,。,0.8,（,km,）,（）,個十分之一,56,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,5.67二、探究新知5.675 680.0為什么,怎樣驗算呢？自己試一試！,5.6,7,二、探究新知,5.,6,7,5 6,8,0.,0,為什么要商,0,呢？,不夠商,1,，用,0,占

6、位。,答：平均每天要跑,0.8km,。,0.8,（,km,）,0.8,7,5.6,驗算：,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,怎樣驗算呢？自己試一試！5.67二、探究新知5.675,列豎式計算。,(2)7.83,9,0.546=,6.3,14,0.87,0.45,7.8,9,0,7 2,6,3,.,3,8 7,6 3,0,6,.,3,14,4,5 6,7,.,0,5,7 0,0,0,0,.,5,6,0,0.5 4,.,0,4,9,0,0.09,0,人教版五年級數(shù)學上冊課件,3,小

7、數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,列豎式計算。(2)7.839,歸納計算方法,除數(shù)是整數(shù)的小數(shù)除法計算方法：,在計算時要按照整數(shù)除法的計算方法去除,;,商的小數(shù)點一定要和被除數(shù)的小數(shù)點對齊,;,如果除到被除數(shù)的末尾仍有余數(shù),就在被除數(shù)的末尾添,0,再繼續(xù)除,;,整數(shù)部分不夠除,在個位商,0,點上小數(shù)點繼續(xù)往下除。,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,歸納計算方法除數(shù)是整數(shù)的小數(shù)除法計算方法：在計

8、算時要按照整,列豎式計算。,（,3,）,12,16,1.2628=,0.416,32,0.75,0.013,1 2,16,0,1 1 2,.,8,.,0,7,8,0,0.,4 1 6,32,0,3 2,9,.,6,0,9 6,1,0,1,.,2,28,0,1 1 2,.,1,0,1 4 0,6,4,4,0,0.045,0,0,0,5,0,5,3,三、鞏固提高,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,列豎式計算。（3）1216 1,1.,爸爸給舅舅打長途電話一共花了,8.4,元。他們共

9、通話,12,分鐘，平均每分鐘付費多少錢？,教材,P26,練習六 第,3,題,8.4,12=0.7,（,元,）,答：,平均每分鐘付費,0.7,元,。,0.7,8.4,12,8 4,0,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,1.爸爸給舅舅打長途電話一共花了8.4元。他們共通話12分鐘,2.,列豎式計算,。,6.6,4=,43.5,29=,1.65,1.5,18.9,27=,0.7,1.35,15=,0.09,6.6,4,1,4,2,.,0,6 5,2 4,2,6,0,2,0,0,4 3

10、.5,29,1,2 9,1,.,5,1 4 5,4,0,5,1 8.9,27,0,1 8 9,.,7,0,1.3,15,0,1 3 5,.,5,0 9,0,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,2.列豎式計算。6.64=43.529=1.651.,37.5,6=,6.25,28.6,11=,2.6,20.4,24=,0.85,3.64,52=,0.07,2.,列豎式計算,。,3 7.5,6,6,3 6,1,.,2,1 2,3,5,0,0,3 0,0,5,2 8.6,11,2,2 2

11、,6,.,6,6 6,6,0,2 0.4,24,0,1 9 2,1,.,8,1 2 0,2,0,0,0,5,3.6,52,0,3 6 4,.,4,0 7,0,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,37.56=6.2528.611=2.620.424=,四、課堂小結(jié),“除數(shù)是整數(shù)的小數(shù)除法”，在計算時要注意什么,?,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,四、課堂小結(jié)“除數(shù)

12、是整數(shù)的小數(shù)除法”，在計算時要注意什么?人,五、提升訓練,二、,計算,下面各題,。,（帶*的要驗算,）,25.2,18=,*,15.6,40=,2 5.2,18,1,1 8,7,.,4,7 2,2,0,1.4,1 5.6,40,0,1 2 0,3,.,3 6 0,6,0,3,9,0,0,0.3 9,4 0,1 5.6,驗算：,0.39,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,五、提升訓練二、計算下面各題。（帶*的要驗算）25.21,80,25=,*,0.828,36=,8 0.,25

13、,3,7 5,5,.,0,0,0,2,5 0,3.2,0.8 2 8,36,0,7 2,1 0,.,1 0 8,8,0,3,0,2,0.023,0.0 2 3,3 6,1 3 8,6 9,0.8 2 8,驗算：,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,8025=*0.82836=8 0.2537 55.,三、在 里填上“”“”或“”。,32.93,37 1,58.8,50 1,310.2,22 1,3.09,3 1,13.8,15 1,59.8,13 1,11.8,10 1,5.8,

14、6 1,大于,小于,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,三、在 里填上“”“”或“”。32.9337,四、一塊長方形菜地的面積是,78m,2,它的長是,15m,?，F(xiàn)要在它的四周圍上竹籬笆，竹籬笆長多少米？,7815=5.2,（,m,）,（,15+5.2,）,2=40.4,（,m,）,答：竹籬笆長,40.4,米。,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,四、一塊長方形菜地

15、的面積是78m2,它的長是15m?，F(xiàn)要在,五、王奶奶從冷食批發(fā)部買回兩箱雪糕。,1.,按批發(fā)價，每根奶油雪糕多少錢？每根水果雪糕多少錢？,23.620=1.18,（元）,29.430=0.98,（元）,答：每根奶油雪糕,1.18,元，每根水果雪糕,0.98,元。,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,五、王奶奶從冷食批發(fā)部買回兩箱雪糕。1.按批發(fā)價，每根奶油雪,2.,按零售價賣完這兩箱雪糕，王奶奶一共賺了多少錢？,（,1.8-1.18,）,20+,（,1.5-0.98,）,30=28,（元）,答：王奶奶一共賺了,28,元。,五、王奶奶從冷食批發(fā)部買回兩箱雪糕。,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,2.按零售價賣完這兩箱雪糕，王奶奶一共賺了多少錢？（1.8-,謝謝欣賞,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,人教版五年級數(shù)學上冊課件,3,小數(shù)除法第,2,課時除數(shù)是整數(shù)的小數(shù)除法課件,謝謝欣賞人教版五年級數(shù)學上冊課件3小數(shù)除法第2課時除數(shù)是整數(shù),