《個(gè)數(shù)除以小數(shù)》PPT課件

1、一個(gè)數(shù)除以小數(shù)一個(gè)數(shù)除以小數(shù) 1 10.40.40.20.2 2 20.90.90.30.3 3 32.482.480.80.8 8 80.960.960.30.3 3 33.33.30.150.15 15151 10.250.25 25251 10.1250.125 1251254 49 924.824.89.69.6330330100100100010007.657.650.850.857 . 6 57 . 6 50.850.859 97 6 57 6 50 09 90.340.340.040.040 . 3 40 . 3 40.040.048 83 23 22 28.58.5先去掉除數(shù)的

2、小數(shù)點(diǎn)，看除數(shù)有幾位小數(shù)，被除先去掉除數(shù)的小數(shù)點(diǎn)，看除數(shù)有幾位小數(shù)，被除數(shù)的小數(shù)點(diǎn)也向右挪動(dòng)幾位。數(shù)的小數(shù)點(diǎn)也向右挪動(dòng)幾位。0 02 02 05 50 0除數(shù)有幾位小數(shù)，被除數(shù)也有幾位小數(shù)，剛剛好！除數(shù)有幾位小數(shù)，被除數(shù)也有幾位小數(shù)，剛剛好！3.483.481.51.53 . 4 83 . 4 81.51.52 230304 4 8 83 34 54 53 3 0 02 23 03 00 02.322.32先去掉除數(shù)的小數(shù)點(diǎn)，先去掉除數(shù)的小數(shù)點(diǎn)，看除數(shù)有幾位小數(shù)，被看除數(shù)有幾位小數(shù)，被除數(shù)的小數(shù)點(diǎn)也向右挪除數(shù)的小數(shù)點(diǎn)也向右挪動(dòng)幾位。動(dòng)幾位。除數(shù)的小數(shù)位數(shù)比被除除數(shù)的小數(shù)位數(shù)比被除數(shù)少時(shí)，有剩余

3、！數(shù)少時(shí)，有剩余！1.441.443.63.612.612.60.280.281 2 . 61 2 . 60.280.284 41 1 21 1 21 41 445450 01 4 01 4 05 50 00 0先去掉除數(shù)的小數(shù)點(diǎn)，先去掉除數(shù)的小數(shù)點(diǎn)，看除數(shù)有幾位小數(shù)，被看除數(shù)有幾位小數(shù)，被除數(shù)的小數(shù)點(diǎn)也向右挪除數(shù)的小數(shù)點(diǎn)也向右挪動(dòng)幾位。動(dòng)幾位。除數(shù)的小數(shù)位數(shù)比被除除數(shù)的小數(shù)位數(shù)比被除數(shù)多時(shí)，要在被除數(shù)的數(shù)多時(shí)，要在被除數(shù)的末尾用末尾用“0 0補(bǔ)足。補(bǔ)足。0.210.210.0120.012一看：看去除數(shù)是幾位小數(shù)；一看：看去除數(shù)是幾位小數(shù)；二移：把除數(shù)和被除數(shù)的小數(shù)點(diǎn)同時(shí)向右挪二移：把除數(shù)和被除數(shù)的小數(shù)點(diǎn)同時(shí)向右挪動(dòng)一樣的位數(shù)，把除數(shù)變成整數(shù)。動(dòng)一樣的位數(shù)，把除數(shù)變成整數(shù)。當(dāng)被除數(shù)的小數(shù)位數(shù)不夠時(shí)，要在它的末尾用當(dāng)被除數(shù)的小數(shù)位數(shù)不夠時(shí)，要在它的末尾用0 0補(bǔ)足。補(bǔ)足。三算：按照除數(shù)是整數(shù)的小數(shù)除法的方法計(jì)算。