<div style="text-align: center;"><span class="Apple-style-span" style="font-weight: bold; "><font class="Apple-style-span" color="#FF0000">小学六年级下学期数学竞赛试卷</font></span></div><div style="text-align: center;"><br></div><span><div style="text-align: center;"><span>六（&nbsp;&nbsp;）班&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;姓&nbsp;名：</span><span style=" text-decoration:underline ; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>&nbsp;&nbsp;&nbsp;成&nbsp;绩：</span><span style=" text-decoration:underline ; ">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;</span></div></span><br><span style=" font-weight:bold; ">一、直接写出得数。</span><span style=" font-weight:bold; ">（16分）</span><br><br><span>35</span><span>×11</span><span>=&nbsp;&nbsp;&nbsp;1</span><span>.</span><span>0</span><span>1×23</span><span>=&nbsp;&nbsp;&nbsp;&nbsp;12</span><span>.</span><span>5</span><span>×0.8</span><span>=&nbsp;&nbsp;&nbsp;&nbsp;1</span><span>.</span><span>01+99=&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;23</span><span>.</span><span>23</span><span>÷23</span><span>=&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>&nbsp;</span><span>4</span><span>÷25</span><span>=&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25</span><span>÷1.25</span><span>=&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5</span><span>.</span><span>68－2</span><span>.</span><span>99=</span><br><br><span style=" font-weight:bold; ">二、巧算每小题得5分，否则得3分</span><span style=" font-weight:bold; ">（满分20分）&nbsp;</span><br><br><span>&nbsp;2.3×3.5+0.23×42+0.23×23　　　　　</span><span>11</span><span>.</span><span>1</span><span>÷0.25&nbsp;&nbsp;&nbsp;&nbsp;</span><br><br><img src="//www.szxuexiao.com/uploadimages/2013/0216/201321601053.jpg?m=0.3359057956840843">　　　　<span>100.8×12.5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>&nbsp;</span><span>&nbsp;</span><br><br><span style=" font-weight:bold; ">三、解方程。</span><span style=" font-weight:bold; ">（12分</span><span style=" font-weight:bold; ">）</span><br><br><span>&nbsp;</span><span>&nbsp;&nbsp;13</span><span>.</span><span>2&nbsp;+&nbsp;x&nbsp;=&nbsp;2x－6</span><span>.</span><span>8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5&nbsp;x&nbsp;－150&nbsp;=&nbsp;2x&nbsp;+&nbsp;150&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（5x+6）</span><span>÷7&nbsp;=&nbsp;8</span><br><br><span style=" font-weight:bold; ">四、填一填（每空3分，共18分）</span><br><br><span>1、两数相除的商是1</span><span>.</span><span>2，如果被除数除以2，除数乘2，那么商是（&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;）。</span><br><br><span>2、若鲜蘑菇晒干后质量减少80%，那么晒制30千克干蘑菇需要（&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;）千克鲜蘑菇。</span><br><br><span>3、将一根木料锯成5段用时24分，如果将这根木料</span><span>锯成10段需要（&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;）分。</span><br><br><span>4、5×（&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;）÷8&nbsp;+&nbsp;16&nbsp;=&nbsp;26。</span><br><br><span>5、一个数除以3.5，余数是1.2，被除数至少再加上（&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;）就没有余数了。</span><br><br><span>6、如果两圆面积之比为16:1，则它们的半径之比为（&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;）。</span><br><br><span style=" font-weight:bold; ">五、解决问题</span><span style=" font-weight:bold; ">（34&nbsp;分）</span><span style=" font-weight:bold; "></span><br><br><span>1、一种商品打八折出售正好够本，那么不打折该商品能获利百分之几？（6分）</span><br><br><span>2、鸡比兔少18只，共有脚306只。鸡兔各有多少只？（7分）</span><br><br><span>3、成本0.25元的练习本1200本，按40%的利润定价出售。售出80%的练习本后，剩下的打折销售完，这样所得的全部利润是预定利润的86%。剩下的练习本出售时按定价打了几折？（7分）</span><br><br><span>4、一家鞋店出售两种运动鞋，一种每双售价48元可赚利20%，另一种赔本20%，售价也是48元。两种运动鞋各卖出10双，是赚还是赔，赚或赔了多少？（7分）</span><br><br><span>5、有一堆煤，用去总数的20%后又运来300吨，此时煤的质量与原来的质量比是13:10。这堆煤原来有多少吨（7分）</span><br><br>