人教版五年級(jí)上除數(shù)是整數(shù)的小數(shù)除法.ppt

除數(shù)是整數(shù)的小數(shù)除法,除數(shù)是整數(shù)的小數(shù)除法,制作：0577wzl,例,5,21.5除以10、100、1000各是多少? 用計(jì)算器計(jì)算,并觀察小數(shù)點(diǎn)位置 的變化情況。,21.5 10,21.5 100,21.5 1000,2.15,0.215,0.0215,小數(shù)點(diǎn)向左移動(dòng)了一位.,小數(shù)點(diǎn)向左移動(dòng)了 兩位.,小數(shù)點(diǎn)向左移動(dòng)了三位.,一個(gè)小數(shù)除以10、100、1000 只要把這個(gè)小數(shù)的小數(shù)點(diǎn)向左移動(dòng) 一位、兩位、三位,小數(shù)的小數(shù)點(diǎn)向左移動(dòng)一位、兩位、三位就是把這個(gè)小數(shù)乘了10、100、1000 ,下面是幾種交通工具的行駛速度.,500米 千米,500 1000 千米,把500的小數(shù)點(diǎn)向左移動(dòng)3位.,你是怎樣想的,在小組里交流.,例,6,噴氣式飛機(jī)每秒飛行多少千米?,0.5,5 0 0,5 0 0.,5 0.0,5.0 0,.5 0 0,0.5 0 0,0.5,5001000 千米,0.5,下面是幾種交通工具的行駛速度.,把125的小數(shù)點(diǎn)向左移動(dòng)3位.,噴氣式飛機(jī)每秒行駛多少千米?,0.125,磁懸浮列車(chē),125米 千米,0.125,125米 千米,試一試,下面是幾種交通工具的行駛速度.,把30的小數(shù)點(diǎn)向左移動(dòng)3位.,磁懸浮列車(chē)每秒行駛多少千米?,0.03,轎車(chē),30米 千米,0.03,30米 千米,試一試,填寫(xiě)下表.,先填上合適的數(shù),再說(shuō)說(shuō)你是怎樣想的.,52.2( )5.42,練一練,1.,2.,102.2( )0.1022,2.17( )0.0217,10( ) 0.1,3.48( )0.348,540( ) 0.54,15.27,1.527,0.1527,3.21,0.321,0.0321,0.08,0.008,0.0008,60,6,0.6,10,100,10,1000,100,1000,直接說(shuō)出得數(shù).,練一練,3.,56.3 10 ,16.5 100 ,40 1000 ,0.03 10 ,8.4 100 ,28.9 1000,5.63,0.165,0.04,0.003,0.084,0.0289,一個(gè)小數(shù)除以10、100、1000 只要把這個(gè)小數(shù)的小數(shù)點(diǎn)向左移動(dòng) 一位、兩位、三位,小數(shù)的小數(shù)點(diǎn)向左移動(dòng)一位、兩位、三位就是把這個(gè)小數(shù)乘了10、100