2023年五年級數(shù)學(xué)上冊五小數(shù)乘法和除法第5課時(shí)練習(xí)十一課件蘇教版

,練習(xí)十一,第,5,課時(shí),蘇教版 數(shù)學(xué) 五年級 上冊,1.通過練習(xí)，進(jìn)一步掌握除數(shù)是整數(shù)的小數(shù)除法的計(jì)算方法，能比較熟練地進(jìn)行計(jì)算。,2.通過解答一些實(shí)際問題，培養(yǎng)數(shù)學(xué)的應(yīng)用意識，提高運(yùn)用所學(xué)知識解決生活中實(shí)際問題的能力。,小數(shù)和整數(shù)相乘,01,除數(shù)是整數(shù)的,小數(shù)除法,02,小數(shù)點(diǎn)移動引起小數(shù)大小變化的規(guī)律,03,算一算,0.55,1.23,0.243,0.459,200.4,0.366,7.2100,71000,0.007,10000.39,390,2.5,0.4,0.72,0.05,8,0.06,0.072,1,64.818,3.6,1325,0.52,5,1 0,3,1 0,4,6,8,6,.,18,4,8,0,.,8,驗(yàn),算,3 .6,1 8,2 8 8,3 6,6 4 8,.,1,25,3,.0,5,5,5 0,0,.,0,1 2 5,0,2,驗(yàn),算,0 .5 2,2 5,2 6 0,1 0 4,1 3 0 0,.,先計(jì)算，再用乘法驗(yàn)算。,2,1.6926,0.065,3.965,0.06,1 5 6,1 3,0.,1 3 0,6,0,1.,9,26,6,0,驗(yàn),算,0.0 6 5,2 6,3 9 0,1 3 0,1 6 9 0,0,0,5,3 9 0,0 .,0,0,3 .,9,65,驗(yàn),算,0.0 6,6 5,3 0,3 6,3 9 0,0,6,.,4.3212,0.36,5.5537,0.15,0.3816,6.08,0.46515,0.031,653.12,202.8,2.3426,0.09,計(jì)算,3,1410,14100,32100,3.2100,0.52100,0.521000,0.12510,0.12510,你能直接在 里填“”“”嗎？,4,180,米（）千米,0.18,20,78,克（）千克,0.078,3.46,噸（）千克,3460,150,厘米（）米,1.5,0.07,公頃（）平方米,700,0.2,平方米（）平方分米,填一填,5,85100,0.85,（千克）,答：,1,千克小麥能加工成,0.85,千克面粉，,1,噸小麥能加工成,850,千克面粉。,0.851000,850,（千克）,1,噸,1000,千克,100,千克小麥能加工成,85,千克面粉。照這樣計(jì)算，,1,千克小麥能加工成多少千克面粉？,1,噸小麥呢？,6,1.56,0.25,（升）,答：每杯果汁有,0.25,升，是,250,毫升。,0.25,升,250,毫升,一瓶,1.5,升的果汁，正好可以倒?jié)M,6,杯。每杯果汁有多少升？是多少毫升？,7,8641230,答：平均每輛汽車每天節(jié)約汽油,2.4,升。,7230,2.4,（升）,一個(gè)車隊(duì)有,12,輛汽車。由于采用了先進(jìn)技術(shù)，這個(gè)車隊(duì)一個(gè)月（,30,天）共節(jié)約汽油,864,升。平均每輛汽車每天節(jié)約汽油多少升？,8,（,30.5,29,25.5,33.5,28.5,）,5,答：她們的平均體重是,29.4,千克。,1475,29.4,（千克）,你會求出她們的平均體重嗎？,下面是五年級一班第一組女生的體重記錄。,9,總結(jié)：除數(shù)是整數(shù)的小數(shù)除法可以先當(dāng)做整數(shù)除法來計(jì)算,除到被除數(shù)末尾仍有余數(shù)的，要在余數(shù)后面添,0,再除。,甲、乙兩數(shù)的和是,16.5,，甲數(shù)的小數(shù)點(diǎn)向右移動一位正好等于乙數(shù)。你知道甲、乙兩數(shù)各是多少嗎？,甲數(shù)：,16.5,（,10,1,）,1.5,乙數(shù)：,1.510,15,答：甲數(shù)是,1.5,，乙數(shù)是,15,。,思考題,10,總結(jié)：,計(jì)算小數(shù)乘法先按整數(shù)乘法的法則算出積，再看因數(shù)中一共有幾位小數(shù)，就從積的右邊數(shù)出幾位，點(diǎn)上小數(shù)點(diǎn)。,