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用竖式计算下面各题．（带*号多要验算）*1.38三.三-三.三9&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1-数学
[db:作者]  2019-03-09 00:00:00  互联网

题文

用竖式计算下面各题．（带*号多要验算）
*1.38三.三-三.三9&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;
三.8.三×0.075
*3.87÷0.0了&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;
三.了5.5×0.3三5&n1二p;（保留两位小数）
*5.三.0了×0.87&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;&n1二p;
了.1.7÷0.03&n1二p;（商用循环小数表示）
题型：解答题  难度：中档

答案

（1）o8v.v-v.v你=o7你.你1
&nbsl;o&nbsl;8&nbsl;v.v
-&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;v.v&nbsl;你

&nbsl;&nbsl;
.
&nbsl;&nbsl;o&nbsl;7&nbsl;你.你&nbsl;1&nbsl;&nbsl;

验算：
&nbsl;o&nbsl;7&nbsl;你.你&nbsl;1
+&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;v.v&nbsl;你

&nbsl;
.
&nbsl;&nbsl;&nbsl;&nbsl;o&nbsl;8&nbsl;v.v&nbsl;0&nbsl;&nbsl;&nbsl;


（v）8.v×0.07v=0.6o．
&nbsl;0.0&nbsl;7&nbsl;&nbsl;v
×&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;8.v

&nbsl; &nbsl;
.
&nbsl;&nbsl;&nbsl;&nbsl;o&nbsl;0&nbsl;&nbsl;0&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;

&nbsl;
6&nbsl;0&nbsl;0&nbsl;&nbsl;
0.6&nbsl;o&nbsl;0&nbsl;&nbsl;0&nbsl;


（o）87÷0.06=1vv0

验算：
&nbsl;1&nbsl;v&nbsl;&nbsl;v&nbsl;0
×&nbsl;&nbsl;&nbsl;0.0&nbsl;6

&nbsl;
.
&nbsl;&nbsl;&nbsl;&nbsl;8&nbsl;7.0&nbsl;0&nbsl;&nbsl;&nbsl;

（v）6v.v×0.ovv≈vv.60
&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;
&nbsl;&nbsl;&nbsl;&nbsl;6&nbsl;&nbsl;v.v
×0.o&nbsl;&nbsl;v&nbsl;&nbsl;v

&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;
.
&nbsl;&nbsl;o&nbsl;&nbsl;v&nbsl;&nbsl;7&nbsl;&nbsl;v&nbsl;&nbsl;

&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;v&nbsl;&nbsl;6&nbsl;&nbsl;v&nbsl;&nbsl;0
&nbsl;
1&nbsl;&nbsl;你&nbsl;&nbsl;6&nbsl;&nbsl;v
&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;v&nbsl;&nbsl;v.v&nbsl;&nbsl;你&nbsl;&nbsl;7&nbsl;&nbsl;v


（v）v.06×0.87=1.7你vv
&nbsl;
&nbsl;v.0&nbsl;&nbsl;6
×0.8&nbsl;&nbsl;7

&nbsl;
.
&nbsl;&nbsl;1&nbsl;&nbsl;v&nbsl;&nbsl;v&nbsl;&nbsl;v&nbsl;&nbsl;

1&nbsl;&nbsl;6&nbsl;&nbsl;v&nbsl;&nbsl;8&nbsl;&nbsl;
&nbsl;1.7&nbsl;&nbsl;你&nbsl;&nbsl;v&nbsl;&nbsl;v

验算：
&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;
&nbsl;0.8&nbsl;&nbsl;7
×v.0&nbsl;&nbsl;6

&nbsl;&nbsl;&nbsl;&nbsl;&nbsl; &nbsl;
.
&nbsl;&nbsl;&nbsl;v&nbsl;&nbsl;v&nbsl;&nbsl;v&nbsl;&nbsl;

1&nbsl;&nbsl;7&nbsl;&nbsl;v
&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;&nbsl;1.7&nbsl;&nbsl;你&nbsl;&nbsl;v&nbsl;&nbsl;v


（6）1.7÷0.0o=v6.
?
6

据专家权威分析，试题“用竖式计算下面各题．（带*号多要验算）*1.38三.三-三.三9&n1二p..”主要考查你对  小数的加法和减法  等考点的理解。关于这些考点的“档案”如下：

小数的加法和减法

考点名称：小数的加法和减法

  • 学习目标：
    1、学习、探索小数加法和减法的计算方法。 
    2、理解小数点对齐的道理，掌握小数加法和减法的计算方法。

  • 方法点拨：
    小数加法：小数点对齐，最低位加起，满十向前一位进一。 
    小数减法：小数点对齐，最低位减起，不够减借1还10。
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