<div style="text-align: center;"><strong><font color="#ff0000">苏教版2016年小学五年级数学下册《因数与倍数的认识》单元测试</font></strong></div><br><strong><span>一、按要求将</span><span>1</span><span>、2、</span><span>17</span><span>、</span><span>20</span><span>、</span><span>32</span><span>、</span><span>68</span><span>、</span><span>41</span><span>、</span><span>57</span><span>、</span><span>81</span><span>、</span><span>91</span><span>、</span><span>97</span><span>填入合适的圈内。再把合数分解质因数。</span></strong><br><br><img src="//www.szxuexiao.com/uploadimages/2016/1114/20161114151229.png?m=0.991554557522947"><br><span><br></span><div><span><strong>二、填空。</strong></span><br><br><span>（1）39÷13=3</span><span>，（</span><span> </span><span>）是（</span><span> </span><span>）的倍数，（</span><span> </span><span>）是（</span><span> </span><span>）的因数。</span><br><br><span>（2）</span><span>在比</span><span>10</span><span>小的自然数中，相邻的两个数都是质数的是（</span><span> </span><span>）和（</span><span> </span><span>），相邻的两个数都是合数的是（</span><span> </span><span>）和（</span><span> </span><span>）。</span><br><br><span>（3）</span><span>写出一</span><span>个有</span><span>4</span><span>个因数的自然数（</span><span> </span><span>）。</span><br><br><span>（4）</span><span>在</span><span>3</span><span>、</span><span>4</span><span>、</span><span>10</span><span>、</span><span>21</span><span>、</span><span>25</span><span>、</span><span>36</span><span>各数中，（</span><span> </span><span>）是</span><span>80</span><span>的因数，</span><span>5</span><span>的倍数有（</span><span> </span><span>）。（</span><span> </span><span>）是（</span><span> </span><span>）的倍数，（</span><span> </span><span>）是（</span><span> </span><span>）的因数。（每个数只能使用一次）</span><br><br><span>（5）</span><span>两个质数的和是</span><span>24</span><span>，它们的积是</span><span>143</span><span>，这两个质数是（</span><span> </span><span>）和（</span><span> </span><span>）。</span><br><br><strong><span>三、判断下面各题，对的画</span><span>“√”</span><span>，错的画</span><span>”×”</span><span>。</span></strong><br><br><span>（</span><span>1</span><span>）</span><span>在自然数中与</span><span>1</span><span>相邻的数只有</span><span>2</span><br><br><span>（</span><span>2</span><span>）</span><span>3</span><span>的倍数，一定是</span><span>9</span><span>的倍数。</span><span>……………………</span><span>………………………</span><span>（ ）</span><br><br><span>（</span><span>3</span><span>）</span><span>奇数都比偶数小。</span><span>………………………………………</span><span>（ ）</span><br><br><span>（</span><span>4</span><span>）</span><span>质数的因</span><span>数只有一个。</span><span>……………………………………………………</span><span>（ ）</span><br><br><span>（</span><span>5</span><span>）</span><span>个数上是</span><span>3</span><span>、</span><span>6</span><span>、</span><span>9</span><span>的数，都是</span><span>3</span><span>的倍数。</span><span>……………………………</span><span>（ ）</span><br><br><span>（</span><span>6</span><span>）</span><span>一个数的因数的个数是无限的。</span><span>………………………………………</span><span>（ ）</span><br><br><span>（</span><span>7</span><span>）</span><span>质数一定是</span><span>奇数，合数一定是偶数</span><span>。</span><span>…………………………………</span><span>（ ）</span><br><br><span>（</span><span>8</span><span>）</span><span>两个质数的和一定是偶数。</span><span>……………………………………………</span><span>（ ）</span><br><br><span><strong>四、选择正确的答案的序号，填在横线上。</strong></span><br><br><span>（1）</span><span>下面有因数、倍数关系的数有（</span><span> </span><span>）。</span><br><br><span>①</span><span>17</span><span>和</span><span>7 </span><span>②</span><span>21</span><span>和</span><span>7 </span><span>③</span><span>8.1</span><span>和</span><span>0.9 </span><span>④</span><span>17</span><span>和</span><span>2</span><br><br><span>（2）</span><span>一个数的最大因数</span><span style="text-decoration:underline"><span> </span></span><span>它的最小倍数。</span><br><br><span>①大于</span><span> </span><span>②等于</span><span> </span><span>③小于</span><br><br><span>（3）</span><span>已知：</span><em><span>a</span></em><span>是</span><span>97</span><span>的因数，那么</span><span style="text-decoration:underline"><span> </span></span><span>。</span><br><br><span>①</span><em><span>a</span></em><span>只能是</span><span>1 </span><span>②</span><em><span>a</span></em><span>只能是</span><span>97 </span><span>③</span><em><span>a</span></em><span>是</span><span>1</span><span>或</span><span>97</span><br><strong><br><span>五、在下面的</span><span>□</span><span>中填入适当的数。</span></strong><br><br><span>（1）6130□ </span><span>能同时被</span><span>2</span><span>和</span><span>5</span><span>都整除；有（</span><span> </span><span>）种填法。</span><br><br><span>（2）5120□ </span><span>既是</span><span>2</span><span>的倍数，也是</span><span>3</span><span>的倍数；有（</span><span> </span><span>）种填法。</span><br><br><span>（3）381□ </span><span>既是</span><span>3</span><span>的倍数，也是</span><span>5</span><span>的倍数；有（</span><span> </span><span>）种填法。</span><br><br><span>（4）7□4□ </span><span>能同时被</span><span>2</span><span>、</span><span>3</span><span>、</span><span>5</span><span>都整除；有（</span><span> </span><span>）种填法。</span><br><br><span><strong>六、按要求写数。</strong></span><br><br><span>（1）</span><span>两个自然数相除，除数是最小的合数，商是</span><span>2</span><span>和</span><span>3</span><span>的倍数的一位数，余数比最小的质数多</span><span>1</span><span>，这个除法算式是</span><span> </span><br><br><span> </span><span>（</span><span> </span><span>）</span><span>÷（ ）=（ ）……</span><span>（</span><span> </span><span>）</span><br><br><span>（2）</span><span>从</span><span>1</span><span>、</span><span>4</span><span>、</span><span>5</span><span>、</span><span>0</span><span>这四个数字中，任意取三个组成三位数，这样的三位数有很多个。请写出所有是</span><span>3</span><span>的倍数的三位数：</span><br><br><span style="text-decoration:underline"><span> </span></span><br><br><span><strong>七、解决问题。</strong></span><br><br><span>1</span><span>．长、宽均为自然数，面积</span><span>为</span><span>48</span><span>、形状不同的长方形共多少种，请一一</span><span>列举出来。</span><br><br><span>2．</span><span>在</span><span>2</span><span>、</span><span>4</span><span>、</span><span>5</span><span>、</span><span>8</span><span>、</span><span>12</span><span>这五个数中，从不同角度看，分别会有一个数与其他数不同。请你写</span><span>出这个数与其他数有什么不同。（写</span><span>3</span><span>种）</span><br><br><span>如：</span><span>2</span><span>是这</span><span>5</span><span>个数中最小的偶数。</span><br><br><span>（</span><span>1</span><span>）</span><span style="text-decoration:underline"><span> </span></span><span> </span><span>（</span><span>2</span><span>）</span><span style="text-decoration:underline"><span> </span></span><span> </span><span>（</span><span>3</span><span>）</span><span style="text-decoration:underline"><span> </span></span><span style="text-decoration:underline"><span> </span></span><br><br><br><div style="text-align: center;"><strong><font color="#38761d">苏教版2016年小学五年级数学下册《因数与倍数的认识》单元测试参考答案</font></strong></div><br><span>一、质数：</span><span>17</span><span>、</span><span>41</span><span>、</span><span>97、2</span><br><br><span>合数：</span><span>20</span><span>、</span><span>32</span><span>、</span><span>68</span><span>、</span><span>57</span><span>、</span><span>81</span><span>、</span><span>91</span><br><br><span> </span><span>分解质因数略</span><br><br><span>二、</span><span>（1）39 </span><span>是</span><span>13</span><span>和</span><span>3</span><span>的倍数，</span><span> 3</span><span>和</span><span>13</span><span>是</span><span>39</span><span>的因数。</span><br><br><span> （2）2</span><span>和</span><span>3</span><span>，</span><span>8</span><span>和</span><span>9</span><br><br><span> （3）8</span><span>（不唯一）</span><br><br><span> （4）10</span><span>，</span><span> 25</span><span>，</span><span>36</span><span>，</span><span>4 </span><span>，</span><span>3 </span><span>，</span><span>21</span><br><br><span> （5）11</span><span>和</span><span>13</span><br><br><span>三、</span><span>（1）× （2）× （3</span><span>）</span><span>× （4）× （5）× （6）×（7）×（8）×</span><br><br><span>四、</span><span>（1）</span><span>②</span><span> （2）</span><span>②</span><span> （3</span><span>）③</span><span> </span><br><br><span>五、</span><span>（1）0</span><span>，一种</span><span> （2）4</span><span>，一种</span><span> （3</span><span>）</span><span>0</span><span>，一种</span><span> </span><br><br><span> （4）1</span><span>和</span><span>0</span><span>，</span><span>4</span><span>和</span><span>0</span><span>，</span><span>7</span><span>和</span><span>0</span><span>，四种</span><span>。</span><br><br><span>六、</span><span>（1）27÷4=6……3</span><br><br><span> （2）105</span><span>，</span><span>150</span><span>，</span><span>501</span><span>，</span><span>510</span><span>，</span><span>450</span><span>，</span><span>405</span><span>，</span><span>540</span><span>，</span><span>5</span><span>04。</span><br><br><span>七、</span><span>1</span><span>．</span></div><div><br>
<table width="100%" border="1"><tbody><tr><td><br>长<br></td><td><br>1<br></td><td><br>2<br></td><td><br>3<br></td><td><br>4<br></td><td><br>6<br></td></tr><tr><td><br>宽<br></td><td><br>48<br></td><td><br>24<br></td><td><br>16<br></td><td><br>12<br></td><td><br>8<br></td></tr></tbody></table>
<br><span>2</span><span>．（1）</span><span>12</span><span>是这五个数中唯一的两位数。</span><br><br><span> （2）5</span><span>是这五个数中唯一的奇数。</span><br><br><span> （3）12</span><span>是这五个数中唯一有因数</span><span>3</span><span>的。</span><br><br></div>
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