考點:小數(shù)乘法,小數(shù)除法
專題:計算題
分析:(1)按小數(shù)乘法的計算法則計算:先按整數(shù)乘法算出積,再看因數(shù)中一共有幾位小數(shù),就從積的右邊起向左數(shù)出幾位點上小數(shù)點,位數(shù)不夠的用0補足;
(2)除數(shù)是小數(shù)的小數(shù)除法,先把除數(shù)按照商不變規(guī)律轉(zhuǎn)化成整數(shù),再按照整數(shù)除法計算,注意商的小數(shù)點和被除數(shù)的小數(shù)點對齊.
解答:
解:13.5×2.8=37.8
3.6÷0.25=14.4
點評:本題主要考查小數(shù)的乘除法,計算小數(shù)乘法時注意位數(shù)不夠的用0補足,除數(shù)是小數(shù)的小數(shù)除法,要先利用商不變規(guī)律把除數(shù)轉(zhuǎn)化成整數(shù)再計算.