2.7×0.6=
0.46×3.5=
10.5÷0.75=
10.8÷4.5=

解:(1)2.7×0.6=1.62;
(2)0.46×3.5=1.61;
(3)10.5÷0.75=14;
(4)10.8÷4.5=2.4.
故答案為:1.62;1.61;14;2.4.
分析:(1)先算27×6=162,數(shù)出兩個因數(shù)共有2位小數(shù),從積的右邊向左數(shù)出兩位,點(diǎn)上小數(shù)點(diǎn);
(2)先算46×35=1610,數(shù)出兩個因數(shù)共有3位小數(shù),從積的右邊向左數(shù)出3位,點(diǎn)上小數(shù)點(diǎn),去掉末尾的0;
(3)按1050÷75進(jìn)行計算;
(4)按照108÷45進(jìn)行計算.
點(diǎn)評:此題考查了小數(shù)的乘法和除法,按照計算法則細(xì)心計算,要注意積的小數(shù)位要和兩個因數(shù)的小數(shù)位的和相同,商和被除數(shù)的小數(shù)點(diǎn)要對齊.
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