《2021年秋五年級數(shù)學(xué)上冊第5單元小數(shù)乘法和除法第9課時一個數(shù)除以小數(shù)二被除數(shù)的小數(shù)位數(shù)比除數(shù)少的小數(shù)除法習(xí)題課件蘇教版》由會員分享,可在線閱讀,更多相關(guān)《2021年秋五年級數(shù)學(xué)上冊第5單元小數(shù)乘法和除法第9課時一個數(shù)除以小數(shù)二被除數(shù)的小數(shù)位數(shù)比除數(shù)少的小數(shù)除法習(xí)題課件蘇教版(11頁珍藏版)》請在裝配圖網(wǎng)上搜索。
1、5,小數(shù)乘法和除法,第,9,課時 被除數(shù)的小數(shù)位數(shù)比除數(shù)少的小數(shù)除法,1,2,3,4,5,6,提示,:,點擊 進(jìn)入習(xí)題,7,,知識點,,被除數(shù)的小數(shù)位數(shù)比除數(shù)少的小數(shù)除法的計算方法,1,.想一想,填一填。,,0.8÷0.25,=,(,,)÷,25,,8.7÷0.29,=,(,,)÷29,,15.3÷0.45,=,(,,)÷45,,我發(fā)現(xiàn):當(dāng)移動除數(shù)的小數(shù)點使除數(shù)變成,(,,),時,被除數(shù)的位數(shù)不夠,要在被除數(shù)的末尾,(,,),補足。,80,870,153,整數(shù),添,0,2,.算一算,填一填。,,43.8÷0.73,=,60,6,0,4,3,8,除數(shù)的小數(shù)點向右移動,(,,),位,被
2、除數(shù)的小數(shù)點也向右移動,(,,),位,被除數(shù)位數(shù)不夠,要,(,,),補足。,兩,兩,添,0,3,.列豎式計算。,,50.4÷0.28,=,39÷0.13,=,180,300,4,.下面的計算對嗎?若不對,請改正。,,易錯,點,,辨析:被除數(shù)位數(shù)不夠忘記添,0,補足,,提升點,1,,商與被除數(shù)的大小關(guān)系,4,5.6,14,6,15,30,小于,等于,大于,6,.一幢高,78,米的樓房,一樓的層高是,4.5,米,其余每層的高度是,3.5,米,這幢樓共有幾層?,(78,-,4.5)÷3.5,=,21(,層,),,21,+,1,=,22(,層,),,答:這幢樓共有,22,層。,,提升點,2,,運用小數(shù)除法解決實際問題,7,.李叔叔從家乘出租車到火車站,共付車費,18.2,元。李叔叔家到火車站的距離最遠(yuǎn)是多少千米?,(18.2,-,5)÷1.65,+,2.5,=,10.5(km),,答:李叔叔家到火車站的距離最遠(yuǎn)是,10.5 km,。,