<div style="text-align: center;"><font color="#ff0000"><span style="font-weight: bold;">2015（秋）</span><span style="font-weight: bold;">新北师大版</span><span style="font-weight: bold;">六年级数学上册第一单元测试卷</span></font></div><br><div style="text-align: center;"><span style="font-weight: bold;">学校：</span><span style="font-weight: bold; text-decoration: underline;"> </span><span style="font-weight: bold;">班级：</span><span style="font-weight: bold; text-decoration: underline;"> </span><span style="font-weight: bold;">姓名：</span><span style="font-weight: bold; text-decoration: underline;"> </span><span style="font-weight: bold;">分数：</span><span style="font-weight: bold; text-decoration: underline;"> </span></div><br><span style=" font-weight:bold; ">一、填空。（20分）</span><span></span><br><br><span>1、画圆时，圆规两脚之间的距离为4厘米，那么这个圆的直径是（ ）厘米，周长是（ ）厘米，面积是（ ）平方厘米。</span><span></span><br><br><span>2</span><span>．在等圆中，所有的直径都</span><span>( </span><span> </span><span> )</span><span>，所有的半径都</span><span>( </span><span> </span><span> )</span><span>。</span><span></span><br><br><span>3</span><span>．圆的直径扩大</span><span>3</span><span>倍，它的周长就扩大</span><span>( )</span><span>倍，它的面积就扩大</span><span>( )</span><span>倍。</span><span></span><br><br><span>4</span><span>．长方形有</span><span>( )</span><span>条对称轴。正方形有</span><span>( )</span><span>条对称轴，等腰三角形有</span><span>( )</span><span>条对称轴，圆有</span><span>( )</span><span>条对称轴。</span><span></span><br><br><span>5</span><span>．在一个边长为</span><span>4</span><span>分米的正方形里，画一个最大的圆，这个圆的直径为</span><span>( </span><span> </span><span>)</span><span>分米，半径为</span><span>( </span><span> </span><span> )</span><span>分米，周长为</span><span>( )</span><span>分米，面积为</span><span>( )</span><span>平方分米。</span><span></span><br><br><span>6</span><span>．把一个圆平均分成若干份，可以拼成一个近似于长方形。长方形的长相当于圆的（ ），宽相当于圆的（ ）。</span><span></span><br><br><span>7</span><span>．一个半圆形的花坛周长是</span><span>30.84</span><span>米，这个半圆形花坛的面积是</span><span>( </span><span> </span><span> )</span><span>。</span><span></span><br><br><span>8、圆心确定圆的（ ），</span><span>半径</span><span>确定圆的（ ）。</span><br><br><span>9、如果把一个圆的半径扩大到原来的2倍，则周长就会扩大到原来的（ ）倍，面积就会扩大到原来的（ ）倍。</span><br><br><span>10、圆的周长是它的直径的（ ）倍多一些，这个倍数是一个固定的数，我们把它叫（ ），常用字母（ ）表示。它是一个（ ）小数，取两位小数是（ ）。</span><br><br><span style=" font-weight: bold; ">二、判断。</span><span style=" font-weight: bold; ">（10分）</span><span style=" font-weight: bold; "></span><br><br><span>1</span><span>．一个圆的周长是它半径的</span><span>2</span><span>π倍。</span><span> ( )</span><span></span><br><br><span>2</span><span>．一个圆的直径，就是这个圆的对称轴。</span><span> ( )</span><span></span><br><br><span>3</span><span>．半圆的周长是与它等半径圆周长的一半。 </span><span> ( )</span><span></span><br><br><span>4</span><span>．通过圆心的线段，叫做直径。</span><span> ( )</span><span></span><br><br><span>5</span><span>．半径是</span><span>2</span><span>厘米的圆，它的周长和面积相等。</span><span> ( )</span><span></span><br><br><span style=" font-weight: bold; ">三、选择</span><span style=" font-weight: bold; ">。（10分）</span><span style=" font-weight: bold; "></span><br><br><span>1</span><span>．一个圆的半径乘以π等于这个圆</span><span> ( )</span><span>。</span><span></span><br><br><span>(1)</span><span>周长的一半 </span><span> （2）面积的1/2 </span><span>(3)</span><span>半圆的周长</span><span></span><br><br><span>2</span><span>．在一个长</span><span>6</span><span>厘米，宽</span><span>4</span><span>厘米的长方形内画一个最大的圆，这个圆的面积是</span><span>________</span><span>平方厘米</span><span>( )</span><span></span><br><br><span>(1)28.26</span><span> </span><span>(2)19.625</span><span> </span><span>(3)12.56</span><span></span><br><br><span>3</span><span>．一个圆的半径</span><span>1</span><span>分米，它的半圆周长是</span><span>________</span><span>分米。</span><span> ( )</span><span></span><br><br><span>(1)3.14</span><span> </span><span>(2)4.14</span><span> </span><span>(3)5.14</span><span></span><br><br><span>4</span><span>．一个圆的直径扩大</span><span>6</span><span>倍，它的面积就</span><span> ( )</span><span></span><br><br><span>(1)</span><span>扩大</span><span>6</span><span>倍 </span><span>(2)</span><span>扩大</span><span>36</span><span>倍 </span><span>(3)</span><span>扩大</span><span>12</span><span>倍</span><span></span><br><br><span>5</span><span>．下面三幅图的阴影部分的面积相比较，</span><span>________</span><span>的面积大。</span><span> ( )</span><span></span><br><br><span>(1)</span><span>图</span><span>(1)</span><span>大 </span><span>(2)</span><span>图</span><span>(2)</span><span>大 </span><span>(3)</span><span>图</span><span>(3)</span><span>大 </span><span>(4)</span><span>同样大</span><span></span><br><br><img src="//www.szxuexiao.com/uploadimages/2015/0831/201583121547.png?m=0.6612852020189166"><br><br><span><strong>四、计算。（8分）</strong></span><br><br><span>3.14×3= 3.14×4= 3.14×9= 3.14×10=</span><br><br><span>3.14×20=</span><span> </span><span> 3.14×16= 3.14×36= 3.14×8=</span><br><br><span style=" font-weight: bold; ">四、</span><span style=" font-weight: bold; ">求阴影部分的面积</span><span style=" font-weight: bold; ">。</span><span style=" font-weight: bold; ">（单位：厘米）（8分）</span><br><br><img src="//www.szxuexiao.com/uploadimages/2015/0831/2015831215851.png?m=0.03933650837279856"><br><br><span style=" font-weight: bold; ">五、动手操作（11分）</span><span style=" font-weight: bold; "></span><br><br><span>1、画出一个周长9.42厘米的圆，并用字母标出圆心、半径、直径。（4分）</span><br><br><span>2、</span><span>画下面图形的对称轴</span><span>。</span><span>（能画几条，就画几条）</span><span>（7分）</span><span></span><br><br><span></span><img src="//www.szxuexiao.com/uploadimages/2015/0831/201583122026.png?m=0.04386376915499568"><br><br><span><strong>六、解决问题：（33分）</strong></span><br><br><span>1、一个圆形的花坛，它的面积是56.52平方米，求这个花坛的周长是多少？</span><br><br><span>2、在一个直径为18米的圆形草地周围铺一条宽4米的环形道路，求这条环形路的面积是多少？</span><br><br><span>3、一个圆形的桌面，直径为80厘米，现在要在桌面上安放一个同样大小的玻璃，求这个桌面玻璃的面积</span><span>？</span><span>如果玻璃每平方米价格为100元，这个玻璃要花多少钱？</span><br><br><span>4、一块圆形草地，它的面积是2826平方米，这块草地的直径是多少？</span><br><br><span>5、一个圆形池塘，它的直径是30米，求它的面积。</span><br><br><span>6、</span><span>一只大钟</span><span>，</span><span>它的</span><span>分针</span><span>长40厘米</span><span>。当从上午8时到上午9时，</span><span>这根</span><span>分</span><span>针的尖端所走的路程是多少厘米？</span><span>扫过的面积是多少平方厘米？（8分）</span><span></span><br><br>
六年级上