最新人教版小学四年级数学《大数的认识》练习题

<div style="text-align: center;"><font color="#ff0000">最新人教版小学四年级数学上册第一单元《大数的认识》练习题一</font><br></div><div><br></div><div><span style=" mso-fareast- ">一.</span><span>填空。</span><span style=" mso-fareast- "></span><br><br><span style=" mso-fareast- ">1</span><span>.</span><span style=" mso-fareast- ">10</span><span>个一千万是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>&nbsp;&nbsp;</span><span style=" mso-fareast- ">&nbsp;</span><span>),</span><span style=" mso-fareast- ">10</span><span>个一亿是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>),</span><span style=" mso-fareast- ">10</span><span>个十亿是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>),</span><span style=" mso-fareast- ">10</span><span>个一百亿是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><br><br><span>2.在整数数位顺序表中,从右向左数,第四位是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位,第九位是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位,第十一位是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位,亿位的右面是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位。</span><span style=" mso-fareast- "></span><br><br><span style=" mso-fareast- ">3</span><span>.20</span><span style=" mso-fareast- ">18760500</span><span>这个数是由2个(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),</span><span style=" mso-fareast- ">1</span><span>个(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;</span><span>&nbsp;&nbsp;</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;</span><span>),(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个百万,(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个十万,(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个万和</span><span style=" mso-fareast- ">5</span><span>个(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)组成的。</span><span style=" mso-fareast- "></span><br><br><span style=" mso-fareast- ">4</span><span>.320</span><span style=" mso-fareast- ">7850009</span><span>是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位数,“3”在(    )位上,表示( &nbsp;&nbsp;&nbsp;  );2在(   )位上,表示(    );</span><span style=" mso-fareast- ">9</span><span>在(   )位上,表示(    )。</span><span style=" mso-fareast- "></span><br><br><span style=" mso-fareast- ">5</span><span>.一个数的最高位是千万位,这个数是(    )位数。</span><span style=" mso-fareast- "></span><br><br><span>一个数的最高位是百亿位,这个数是(  </span><span style=" mso-fareast- ">&nbsp;&nbsp;</span><span> )位数。</span><span style=" mso-fareast- "></span><br><br><span>6、一千万是由(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个一百万组成的。一千万是由(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个十万组成的。</span><br><br><span>7、用1、2、3、4、0、0、0组成七位数,最大的是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),最小的是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><span style=" mso-fareast- "></span><br><br><span>二.说出下列各数是几位数,最高位是什么数位。</span><span style=" mso-fareast- "></span><br><br><span style=" mso-fareast- ">1</span><span>.</span><span style=" mso-fareast- ">1987500</span><span>是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位数,最高位是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位。</span><span style=" mso-fareast- "></span><br><br><span>其中,“</span><span style=" mso-fareast- ">9</span><span>”在(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位上,表示(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><span style=" mso-fareast- "></span><br><br><span>“</span><span style=" mso-fareast- ">7</span><span>”在(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位上,表示(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><span style=" mso-fareast- "></span><br><br><span style=" mso-fareast- ">2</span><span>.</span><span style=" mso-fareast- ">76000009</span><span>是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位数,最高位是</span><span style=" mso-fareast- ">(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span><span>位。</span><span style=" mso-fareast- "></span><br><br><span>其中,“</span><span style=" mso-fareast- ">6</span><span>”在(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位上,表示(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><span style=" mso-fareast- "></span><br><br><span>“</span><span style=" mso-fareast- ">9</span><span>”在(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位上,表示(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><span style=" mso-fareast- "></span><br><br><span style=" mso-fareast- ">3</span><span>.13</span><span style=" mso-fareast- ">27000000</span><span>是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位数,最高位是(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位。</span><span style=" mso-fareast- "></span><br><br><span>其中,“1”在(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)位上,表示(</span><span style=" mso-fareast- ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><br><br><span>“3”在(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)位上,表示(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><br><span>三、默写数位顺序表</span></div><div><br><img src="//www.szxuexiao.com/uploadimages/2015/0911/201591111567.png?m=0.7550149760209024"><br><br><br><font color="#ff0000">最新人教版小学四年级数学上册第一单元《大数的认识》练习题二</font><br><br><span>一、先补充数位,再对齐数位写数。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2015/0911/2015911115756.png?m=0.3637132290750742"><br><br><span>二.连线。</span><br><br><span>20007000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;204001&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;30607000</span><br><br><span><o:p>&nbsp;</o:p></span><br><br><span>只读一个零&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;读两个零&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;一个零也不读</span><br><br><span><o:p>&nbsp;</o:p></span><br><br><span>2010004082&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6008000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;120500&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7000004</span><br><br><span><o:p>&nbsp;</o:p></span><br><br><span>三.请先划分下面各数的数级,再读出来。</span><br><br><span>6207800&nbsp;&nbsp;&nbsp;&nbsp;读作:</span><span style=" text-decoration:underline; text-underline:single; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><span>30000001&nbsp;&nbsp;&nbsp;读作:</span><span style=" text-decoration:underline; text-underline:single; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><span>98725000&nbsp;&nbsp;&nbsp;读作:</span><span style=" text-decoration:underline; text-underline:single; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><span>7650000000&nbsp;&nbsp;&nbsp;读作:</span><span style=" text-decoration:underline; text-underline:single; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><span>900750007&nbsp;&nbsp;&nbsp;读作:</span><span style=" text-decoration:underline; text-underline:single; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><span>600500200000&nbsp;&nbsp;&nbsp;读作:</span><span style=" text-decoration:underline; text-underline:single; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><span>87000000700&nbsp;&nbsp;&nbsp;读作:</span><span style=" text-decoration:underline; text-underline:single; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><br><font color="#ff0000">最新人教版小学四年级数学上册第一单元《大数的认识》练习题三</font><br><br><span>一、按照要求写。</span><br><br><span>1.在○ 内填上“﹥&nbsp;”“</span><span>&nbsp;﹤</span><span>”或“</span><span>&nbsp;﹦</span><span>”。</span><br><br><span>23586</span><span>&nbsp;○</span><span>&nbsp;230000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;675900</span><span>&nbsp;○&nbsp;</span><span>700000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12000000&nbsp;</span><span>&nbsp;○</span><span>3800000</span><br><br><span>98756</span><span>&nbsp;○</span><span>&nbsp;10000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;410200</span><span>&nbsp;○</span><span>&nbsp;270000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3670001</span><span>&nbsp;○</span><span>&nbsp;36700001</span><br><br><span>2.3400760&nbsp;&nbsp;&nbsp;&nbsp;11203400&nbsp;&nbsp;&nbsp;&nbsp;4001290&nbsp;&nbsp;&nbsp;&nbsp;980968&nbsp;&nbsp;&nbsp;&nbsp;3400670&nbsp;&nbsp;(从小到大排列)</span><br><br><span>3.11010&nbsp;&nbsp;&nbsp;&nbsp;9998&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10000&nbsp;&nbsp;&nbsp;&nbsp;99890&nbsp;&nbsp;&nbsp;&nbsp;1010000&nbsp;&nbsp;(从大到小排列)</span><br><br><span>二.选择。</span><br><br><span>1.用7、0、5、8、6这五个数组成的五位数中,最小的数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),最大的数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><br><span>A.78065&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B.87650&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C.50678&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D.80756</span><br><br><span>2.下列数中最大的数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),最小的数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><br><span>A.4320001&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B.4320010&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C.4320100&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D.4321000</span><br><br><span>3.在</span><span>□</span><span>里填上(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),5</span><span>□</span><span>7300最接近600000。</span><br><br><span>A.0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B.5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C.8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D.9</span><br><br><span>三.把下面各数万位后面的尾数省略,求出它们的近似数。</span><br><br><span>16739600≈        974000≈         795400≈</span><br><br><span>164999≈         1307200≈ </span><span>       2044700≈</span><br><br><span>四.解决问题。</span><br><br><span>1、一个数百万位上是7,十万位上和千位上都是5,其他各位上都是0,这个数是多少?省略万位后面的尾数,近似数是多少?(写出数位)</span><br><br><span>2、省略百位后面的尾数:20167396045≈</span><br><br><span>省略千位后面的尾数:20167396045≈</span><br><br><span>省略万位后面的尾数:20167396045≈</span><br><br><span>省略亿位后面的尾数:20167396045≈</span><span style=" font-weight:bold; "></span><br><br><br><font color="#ff0000">最新人教版小学四年级数学上册第一单元《大数的认识》练习题四</font><br><br><span>一.填空。</span><br><br><span>1.最大的六位数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),省略“万”位后面的尾数的近似数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)万。</span><br><br><span>2.最小的自然数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),自然数的个数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><br><span>3.相邻两个计数单位之间的进率是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><span><br></span></div><div><span>4.由625个万,3001个一组成的数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),省略万位后面的尾数约等于(  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  )。</span><br><br><span>5.1</span><span>8□3096≈180万,□中应该填( &nbsp;&nbsp;   )。</span><br><br><span>51</span><span>□096≈51万,□中可以填(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><br><span>二.选择。</span><br><br><span>1.省略万位后面的尾数,求近似数时,只有千位上的数字(   )时,才要向万位进1。</span><br><br><span>A.是5       B.等于或大于5       C.小于4</span><br><br><span>2.一个数省略万位后面的尾数约是3万,这个数</span><span style=" font-weight:bold; ">不可能</span><span>是(    ).</span><br><br><span>A.35004       B.26412        C.34100</span><br><br><span>3.4□736≈5万,□里最小的能填(   )</span><br><br><span>A.9         B.5         C.0</span><br><br><span>4.632100千米改写成用“万千米”作单位约是(    )</span><br><br><span>A.63万千米     B.632万千米       C.630万千米</span><br><br><span>三.把下面各数亿位后面的尾数省略,求出近似数。</span><br><br><span>1673960000≈        974000000≈         7954000000≈</span><br><br><span>1649990000≈        130720000≈        &nbsp;&nbsp;204470000≈</span><br><br><span>四.解决问题。</span><br><br><span>1.一个数是由2个亿,5个百万,3个十万,9个千组成的,这个数是多少?(写出数位)</span><br><br><span>省略万位后面的尾数,它的近似数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),省略亿后面的尾数,近似数是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><br><span>2.按照要求,用“1、2、3、4”和4个“0”组成四位数:(各写一个即可)</span><br><br><span>(1)一个零也不读:</span><br><br><span>(2)只读一个零:</span><br><br><span>(3)读两个零:</span><br><br><br><font color="#ff0000">最新人教版小学四年级数学上册第一单元《大数的认识》练习题五</font><br><br><span>一.</span><span>填空。</span><br><br><span>1.在射线、直线和线段中,(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)和(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)有端点,(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)是可以测量的。</span><br><br><span>2.从一点引出两条(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),所组成的图形叫做角。这一点叫做角的(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;),这两条射线叫做角的(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)。</span><br><br><span>3.经过一点可以画(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)条直线,经过两点只能画(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)条直线。</span><br><br><span>4.(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)和(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)都可以看作是直线的一部分。</span><br><br><span>二.判断。</span><br><br><span>1.直线比射线和线段都长。(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span><br><br><span>2.一条射线是50厘米。(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span><br><br><span>3.过一点可以画无数条射线。(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span><br><br><span>4.右图中,最长的线段是AB。(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span><br><br><span>5.直线没有端点,可以无限延长;射线和线段不可以无限延长。(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span><br><br><span>三.选择。</span><br><br><span>1.只有一个端点的是(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span></div><div><span><br></span></div><div><span>A.线段 &nbsp; &nbsp; &nbsp; &nbsp; B.直线 &nbsp; &nbsp; &nbsp; C.射线</span><br><br><span>2.直线与射线相比(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</span></div><div><span><br></span></div><div><span>A.直线长 &nbsp; &nbsp; &nbsp; &nbsp;B.射线长&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C.一样长 &nbsp; &nbsp; D.无法比较</span><br><br><span>3.经过两点,可以画(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)直线。</span></div><div><span><br></span></div><div><span>A.一 &nbsp; &nbsp; &nbsp; &nbsp; B.两 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C.无数</span><br><br><span>4.(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)</span><span>可以向两端无限延长,(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)可以向一端无限延长。</span><br><br><span>A.直线 &nbsp; &nbsp; &nbsp; &nbsp;B.&nbsp;射线 &nbsp; &nbsp; &nbsp; &nbsp; C.线段</span><br><br><span style=" z-index:1; left:0px; "></span><span>四.数一数。</span><br><br><span>1.右图中有(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)条线段。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2015/0911/201591112445.png?m=0.8875417234376073"><br><br><span>2、下图中有(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)条线段。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2015/0911/201591112525.png?m=0.6503251888789237"><br><br><span>3.右图中有(&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)个角。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2015/0911/20159111265.png?m=0.5408684255089611"><br></div><div><br></div>