分析:(1)小數(shù)乘法法則: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),就從得數(shù)的右邊起數(shù)出幾位,點(diǎn)上小數(shù)點(diǎn),得數(shù)的小數(shù)部分末尾有0,一般要把0去掉.
(2)除數(shù)是小數(shù)的小數(shù)除法法則:先看除數(shù)中有幾位小數(shù),就把被除數(shù)和除數(shù)的小數(shù)點(diǎn)向右移動(dòng)幾位,數(shù)位不夠的用零補(bǔ)足,然后按照除數(shù)是整數(shù)的小數(shù)除法來除;保留商為兩位小數(shù),就要多除出一位,再運(yùn)用四舍五入的方法求商的近似值即可;驗(yàn)算除法,就用商乘除數(shù)看是否等于被除數(shù)即可.
解答:解:(1)2.6×1.08=2.808;
![精英家教網(wǎng)](http://thumb.zyjl.cn/pic3/upload/images/201303/96/27013279.png)
(2)53×2.07=109.71;
![精英家教網(wǎng)](http://thumb.zyjl.cn/pic3/upload/images/201303/96/b415d74c.png)
(3)32÷42≈0.76;
![精英家教網(wǎng)](http://thumb.zyjl.cn/pic3/upload/images/201303/96/fd281a7b.png)
(4)16.9÷0.13=130.
![精英家教網(wǎng)](http://thumb.zyjl.cn/pic3/upload/images/201303/96/2282cbef.png)
![精英家教網(wǎng)](http://thumb.zyjl.cn/pic3/upload/images/201303/96/81a5a848.png)
點(diǎn)評:此題考查小數(shù)乘、除法的計(jì)算和驗(yàn)算,列豎式時(shí)要細(xì)心,注意積或商中小數(shù)點(diǎn)的位置.