11.用豎式計(jì)算.(帶※的要驗(yàn)算帶?的商要精確到百分位)
50.6×0.5=
※1.75÷3.5=
?0.76×1.45=
?7.8÷6.3=
分析 根據(jù)小數(shù)乘除法的豎式計(jì)算方法進(jìn)行解答即可.
解答 解:(1)50.6×0.5=25.3;
![](http://thumb.zyjl.cn/pic3/quiz/images/201701/121/e3710cba.png)
(2)1.75÷3.5=0.5;
![](http://thumb.zyjl.cn/pic3/quiz/images/201701/121/451811db.png)
(3)0.76×1.45≈1.10;
![](http://thumb.zyjl.cn/pic3/quiz/images/201211/60/03531e40.png)
(4)7.8÷6.3≈1.24.
![](http://thumb.zyjl.cn/pic3/quiz/images/201701/121/2a981d88.png)
點(diǎn)評 考查了小數(shù)乘除法的筆算,根據(jù)各自的計(jì)算方法進(jìn)行計(jì)算.用四舍五入法保留小數(shù)的位數(shù),注意小數(shù)除法的驗(yàn)算方法.