<span><strong>一、填空。</strong></span><br><br><span>1</span><span>．如下图，小旗绕点</span><em><span>A</span></em><span>(</span><span> </span><span>)</span><span>时针旋转了</span><span>(</span><span> </span><span>)</span><span>°。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832693735.png?m=0.8104512163581516"><br><br><span>2</span><span>．从</span><span>6</span><span>：</span><span>15</span><span>到</span><span>6</span><span>：</span><span>30</span><span>，分针旋转了</span><span>(</span><span> </span><span>)</span><span>°。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832694719.png?m=0.5757294249022158"><br><br><span>3</span><span>．如下图，指针从点</span><em><span>B</span></em><span>开始，绕点</span><em><span>O</span></em><span>顺时针旋转</span><span>90</span><span>°到点</span><span>(</span><span> </span><span>)</span><span>；指针从点</span><em><span>B</span></em><span>开始，绕点</span><em><span>O</span></em><span>逆时针旋转</span><span>90</span><span>°到点</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/20183269483.png?m=0.9170424783849167"><br><br><span>4</span><span>．看图完成下面各题。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832694852.png"><br><br><span>(1)</span><span>图形</span><span>1</span><span>先绕点</span><em><span>B</span></em><span>顺时针旋转</span><span>(</span><span> </span><span>)°</span><span>，再向</span><span>(</span><span> </span><span>)</span><span>平移</span><span>(</span><span> </span><span>)</span><span>格后与图形</span><span>2</span><span>重合。</span><br><br><span>(2)</span><span>图形</span><span>2</span><span>先绕点</span><em><span>C</span></em><span>顺时针旋转</span><span>(</span><span> </span><span>)°</span><span>，再向</span><span>(</span><span> </span><span>)</span><span>平移</span><span>(</span><span> </span><span>)</span><span>格后与图形</span><span>3</span><span>重合。</span><br><br><span>(3)</span><span>图形</span><span>3</span><span>先绕点</span><em><span>D</span></em><span>顺时针旋转</span><span>(</span><span> </span><span>)°</span><span>，再向</span><span>(</span><span> </span><span>)</span><span>平移</span><span>(</span><span> </span><span>)</span><span>格后与图形</span><span>4</span><span>重合。</span><br><br><span><strong>二、画一画。</strong></span><br><br><span>1</span><span>．画出三角形</span><em><span>AOB</span></em><span>绕点</span><em><span>O</span></em><span>逆时针旋转</span><span>90</span><span>°后的图形。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832694948.png?m=0.22885969587712318"><br><br><span>2</span><span>．画出锤形图绕点</span><em><span>O</span></em><span>顺时针旋转</span><span>90</span><span>°后的图形。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695019.png?m=0.47905466093338167"><br><br><span>3</span><span>．画出小旗先绕点</span><em><span>O</span></em><span>顺时针旋转</span><span>90</span><span>°，再向右平移</span><span>3</span><span>格后的图形。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695049.png?m=0.6089440441550866"><br><br><span><strong>三、选择。</strong></span><br><br><span>1</span><span>．下面的图形中，以点</span><em><span>B</span></em><span>为旋转中心的是</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695140.png?m=0.629055829069455"><br><br><span>A</span><span>．图</span><span>1 B</span><span>．图</span><span>2 C</span><span>．图</span><span>3</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695244.png?m=0.10217122019739833"><br><br><span>3</span><span>．如下图，图形</span><span>A</span><span>通过怎样的运动才能与图形</span><span>C</span><span>重合？正确答案为</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695333.png?m=0.7205985146573413"><br><br><span>A</span><span>．图形</span><span>A</span><span>绕点</span><em><span>O</span></em><span>顺时针旋转</span><span>90</span><span>°</span><br><br><span>B</span><span>．图形</span><span>A</span><span>绕点</span><em><span>O</span></em><span>逆时针旋转</span><span>90</span><span>°</span><br><br><span>C</span><span>．图形</span><span>A</span><span>绕点</span><em><span>O</span></em><span>逆时针旋转</span><span>90</span><span>°，再绕点</span><em><span>O</span></em><span>逆时针旋转</span><span>90</span><span>°</span><br><br><span><strong>四、解决问题。</strong></span><br><br><span>1</span><span>．将方格纸中的图形以点</span><em><span>O</span></em><span>为中心，按顺时针方向连续三次旋转</span><span>90</span><span>°，画出旋转后的图形。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695421.png?m=0.9739487717769189"><br><br><span>2</span><span>．观察下面方格纸中的图形。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695457.png?m=0.8853206669737661"><br><br><span>(1)</span><span>图形</span><span>A</span><span>通过怎样的运动才能与图形</span><span>B</span><span>重合？</span><br><br><span>(2)</span><span>图形</span><span>B</span><span>通过怎样的运动才能与图形</span><span>C</span><span>重合？</span><br><br><span>(3)</span><span>图形</span><span>A</span><span>通过怎样的运动才能与图形</span><span>C</span><span>重合？</span><br><br><span>3</span><span>．按要求画一画。</span><br><br><span>(1)</span><span>把图形</span><span>A</span><span>绕点</span><em><span>O</span></em><span>顺时针旋转</span><span>90</span><span>°，再向右平移</span><span>2</span><span>格。</span><br><br><span>(2)</span><span>把图形</span><span>C</span><span>绕点</span><em><span>O</span></em><span>逆时针旋转</span><span>90</span><span>°，再向下平移</span><span>2</span><span>格。</span><br><br><span>(3)</span><span>把图形</span><span>D</span><span>绕点</span><em><span>O</span></em><span>′</span><span>顺时针旋转</span><span>90</span><span>°，再向左平移</span><span>2</span><span>格。</span><br><br><span>(4)</span><span>把图形</span><span>B</span><span>绕点</span><em><span>O</span></em><span>′</span><span>逆时针旋转</span><span>90</span><span>°，再向上平移</span><span>2</span><span>格。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695531.png?m=0.965947248809699"><br><br><br><div style="text-align: center;"><strong><font color="#38761d">2018年新人教版小学五年级数学下册《第五单元》测试题答案</font></strong></div><br><span>一、</span><span>1.</span><span>逆 </span><span>90</span><br><br><span>2</span><span>．</span><span>90</span><br><br><span>3</span><span>．</span><em><span>C</span></em><span> </span><em><span>A</span></em><br><br><span>4</span><span>．</span><span>(1)90</span><span> 下 </span><span>1</span><br><br><span>(2)90</span><span> 左 </span><span>1</span><br><br><span>(3)90</span><span> 上 </span><span>1</span><br><br><span>二、</span><div><span><br></span></div><div><img src="//www.szxuexiao.com/uploadimages/2018/0326/201832695715.png?m=0.11263859292448686"><br><br><span>三、</span><span>1.B</span><br><br><span>2</span><span>．</span><span>B</span><br><br><span>3</span><span>．</span><span>B</span><br><br><span>四、</span><span>略</span><br></div>
五年级下