深圳市小学三年级数学竞赛试卷及答案

<div style="text-align: center;"><span style="font-weight: bold;"><font color="#ff0000">深圳市小学三年级数学竞赛试卷</font></span></div><br><span style=" font-weight:bold; ">一、想想、算算、填填。</span><span>(</span><span>21分)</span><br><br><span>  (</span><span>1)18乘516写作(&nbsp;),还可以读作(&nbsp;),表示(&nbsp;)个(&nbsp;</span><span>)连加的和是多少。</span><br><br><span>  (</span><span>2)5□4×6≈3000,□里可以填(&nbsp;)。</span><br><br><span>  </span><span>3□91÷5≈700,□里可以填(&nbsp;)。</span><br><br><span>  (</span><span>3)从1921年7月1日中国共产党诞生,到1949年10月1日中华人民共和国成立,经过了(&nbsp;</span><span>)个月。</span><br><br><span>  (</span><span>4)新华书店上午9∶00开始营业,下午5∶30停止营业,全天营业时间是(&nbsp;)小时(&nbsp;</span><span>)分。</span><br><br><span>  (</span><span>5)小冬买了20米长的铁丝,20米指的是铁丝的(&nbsp;)。一块三合板2平方米,2平方米指的是三合板的(&nbsp;</span><span>)。</span><br><br><span>  (</span><span>6)一个正方形和一个长方形的周长相等,(&nbsp;)的面积大。</span><br><br><span>  (</span><span>7)□×△=36,□÷△=4,□=(&nbsp;),△=(&nbsp;)。</span><br><br><span>  (</span><span>8)某年的9月有5个星期日,这一年的9月1日不是星期日,它是星期(&nbsp;)。</span><br><br><span>  (</span><span>9)如果每人的步行速度相同,3个人一起从甲地走到乙地,要2小时,那么,6个人一起从甲地走到乙地要(&nbsp;</span><span>)小时。</span><br><br><span>  (</span><span>10)甲乙两队进行篮球比赛,结果两队总分之和是100分,现在知道甲队加上7分,就比乙队多1分,那么甲队原来得(&nbsp;)分,乙队得(&nbsp;</span><span>)分。</span><br><br><span style=" font-weight:bold; ">二、在□里填上合适的数字。</span><span>(</span><span>8分)</span><br><br><img src="//www.szxuexiao.com/uploadimages/2014/0710/2014710111434.jpg?m=0.2049774299375713"><br><br><span style=" font-weight:bold; ">三、巧添符号。</span><span>(</span><span>12分)</span><br><br><span>  (</span><span>1)6○6○6○6=1&nbsp;(2)6○6○6○6=2</span><br><br><span>  (</span><span>3)6○6○6○6=3&nbsp;(4)6○6○6○6=4</span><br><br><span style=" font-weight:bold; ">四、数一数,下图中共有()个三角形。</span><span>(</span><span>5分)</span><br><br><img src="//www.szxuexiao.com/uploadimages/2014/0710/201471011157.jpg?m=0.22847485193051398"><br><br><span style=" font-weight:bold; ">五、画一画,分一分,拼一拼。</span><span>(</span><span>10分)</span><br><br><span>  (</span><span>1)把一块地(如下图)分给5个种植小组,每组分得的土地形状和大小要相同。应该怎样分?(画图表示)</span><br><br><img src="//www.szxuexiao.com/uploadimages/2014/0710/2014710111539.jpg?m=0.39231276931241155"><br><br><span>  (</span><span>2)有12个边长为1厘米的小正方形,拼成一个长方形,怎样拼才能使长方形的周长最长?(画图)</span><br><br><span style=" font-weight:bold; ">六、想一想,再列式解答。</span><span>(</span><span>44分)</span><br><br><span>  (</span><span>1)方方和圆圆用同一个数做除法,方方用12去除,圆圆用15去除,方方除得的商是32还余6。圆圆计算的结果应该是多少?(8分)</span><br><br><span>  (</span><span>2)小红家养了一些鸡,黄鸡比黑鸡多13只,比白鸡少18只。白鸡的只数是黄鸡的2倍。白鸡、黄鸡、黑鸡一共有多少只?(8分)</span><br><br><span>  (</span><span>3)三年级数学竞赛获奖的同学中,男同学获奖的人数比女同学多2人,女同学比男同学获奖人数的一半多2人。男、女同学各有几人获奖?(8分)</span><br><br><span>  (</span><span>4)庆祝“六一”儿童节,5个女同学做纸花,平均每人做5朵,已知每个同学做的数量各不相同,其中有一个人做得最快,她最多做多少朵?(简要说出算理)(10分)</span><br><br><span>  (</span><span>5)一串珠子,按照3颗黑珠、2棵白珠,3颗黑珠、2颗白珠……的顺序排列。问:①第14颗珠子是什么颜色的?②第1998颗珠子是什么颜色的?(10分)</span><br><br><br><div style="text-align: center;"><span style="font-weight: bold;"><font color="#38761d">参考答案和评分意见</font></span></div><br><span style=" font-weight:bold; ">一、第(</span><span style=" font-weight:bold; ">1)小题3分,其余每小题2分,计21分。</span><span style=" font-weight:bold; "></span><br><br><span>  (</span><span>1)516×18,516乘以18,18个516;</span><br><br><span>  (</span><span>2)0、1、2、3、4;5、6、7、8、9;</span><br><br><span>  (</span><span>3)339;(4)8小时30分;(5)长度,面积;(6)正方形;</span><br><br><span>  (</span><span>7)12,3;(8)六;(9)2;(10)47,53。</span><br><br><span style=" font-weight:bold; ">二、每小题</span><span style=" font-weight:bold; ">4分,计8分。</span><span style=" font-weight:bold; "></span><br><br><img src="//www.szxuexiao.com/uploadimages/2014/0710/2014710111617.jpg?m=0.8745753082912415"><br><br><span style=" font-weight:bold; ">三、每小题</span><span style=" font-weight:bold; ">3分,计12分。</span><span style=" font-weight:bold; "></span><br><br><span>  (</span><span>1)÷、×、÷;(2)÷、+&nbsp;、÷;</span><br><br><span>  (</span><span>3)+&nbsp;、+&nbsp;、÷;(4)-&nbsp;、+&nbsp;、÷。</span><br><br><span style=" font-weight:bold; ">四、</span><span style=" font-weight:bold; ">16个,填对得5分。</span><span style=" font-weight:bold; "></span><br><br><span style=" font-weight:bold; ">五、每小题</span><span style=" font-weight:bold; ">5分,计10分。</span><span style=" font-weight:bold; "></span><br><br><img src="//www.szxuexiao.com/uploadimages/2014/0710/2014710111653.jpg?m=0.06107877450995147"><br><br><span style=" font-weight:bold; ">六、</span><span style=" font-weight:bold; "></span><br><br><span>  (</span><span>1)解:(32×12+6)÷15&nbsp;4分</span><br><br><span>  </span><span>=390÷15&nbsp;5分</span><br><br><span>  </span><span>=66&nbsp;7分</span><br><br><span>  答:圆圆计算的结果应是</span><span>66。&nbsp;8分</span><br><br><span>  (</span><span>2)解:18÷(2-1)</span><br><br><span>  =</span><span>18(只)&nbsp;黄鸡的只数&nbsp;2分</span><br><br><span>  </span><span>18×2=36(只)&nbsp;白鸡的只数&nbsp;4分</span><br><br><span>  </span><span>18-13=5(只)&nbsp;黑鸡的只数&nbsp;6分</span><br><br><span>  </span><span>18+36+5=59(只)&nbsp;三种鸡共有的只数&nbsp;8分</span><br><br><span>  (</span><span>3)解:(2+2×2)÷(2-1)&nbsp;5分</span><br><br><span>  </span><span>=6(人)&nbsp;女同学获奖人数&nbsp;6分</span><br><br><span>  </span><span>6+2=8(人)&nbsp;男同学获奖人数&nbsp;8分</span><br><br><span>  (</span><span>4)分析与解答:5人平均每人做5朵,共做</span><br><br><span>  </span><span>5×5=25(朵)&nbsp;2分</span><br><br><span>  要求“最多做几朵”,其中一人要尽可能的多,另外</span><span>4人必须尽可能的少,并且考虑到每人做的数量各不相同,因此,另外4人最小应分别为:1、2、3、4朵。&nbsp;5分</span><br><br><span>  故得:</span><span>25-(1+2+3+4)=15(朵)&nbsp;8分</span><br><br><span>  (</span><span>5)解:①14÷(3+2)=2(组)&nbsp;4(颗)&nbsp;3分</span><br><br><span>  所以,第</span><span>14颗是白色的。&nbsp;5分</span><br><br><span>  ②</span><span>1998÷(3+2)=399(组)&nbsp;3(颗)&nbsp;8分</span><br><br><span>  所以,第</span><span>1998颗珠子是黑色的。&nbsp;10分</span><br><br>{$setpage}<div><br><br><div style="text-align: center;"><span style="font-weight: bold;"><font color="#ff0000">深圳市三年级小学生数学竞赛试卷二</font></span></div><br><strong><span>一、计算:(写出主要的过程)每小题</span><span>8</span><span>分,共</span><span>16</span><span>分。</span></strong><br><br><span>1.&nbsp;</span><span>1.</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>100-98+96-94+92-90+</span><span>……</span><span>+8-6+4-2</span><br><br><span>2.&nbsp;</span><span>2.</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>1001</span><span>×</span><span>1001-1001</span><br><br><strong><span>二、填空:(</span><span>1-10</span><span>小题每小题</span><span>8</span><span>分,</span><span>11-14</span><span>小题每小题</span><span>11</span><span>分)</span></strong><br><br><span>1.&nbsp;&nbsp;</span><span>两个数的和是</span><span>682</span><span>,其中一个加数的个位是</span><span>0</span><span>,若把</span><span>0</span><span>去掉则与另一个加数相同,这两个数分别是(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)和(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><br><br><span>2.&nbsp;&nbsp;</span><span>已知九个数的平均数是</span><span>72</span><span>,去掉其中的一个数之后,余下的数平均为</span><span>78</span><span>,去掉的数是(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><br><br><span>3.&nbsp;&nbsp;2</span><span>、</span><span>4</span><span>、</span><span>6</span><span>、</span><span>8</span><span>、</span><span>10</span><span>,这些数都是双数,比</span><span>101</span><span>小的所有的双数的和是(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)。</span><br><br><span>4.</span><span>&nbsp;</span><span>在一条长</span><span>360</span><span>米的公路两旁种树,每隔</span><span>5</span><span>米种一棵,两头都要种,一共要种(</span><span>&nbsp;&nbsp;&nbsp;</span><span>)棵树。</span><br><br><span>5.</span><span>&nbsp;</span><span>小明和小亮各拿出同样多的钱一起去买若干支同样价钱的钢笔,已知小明比小亮少买</span><span>30</span><span>支钢笔,得到小亮还给的钱是</span><span>180</span><span>元。这种笔每支(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)元。</span><br><br><span>6.</span><span>&nbsp;</span><span>56</span><span>个荔枝与</span><span>48</span><span>个杏子重量相等,每个杏子比荔枝重</span><span>5</span><span>克。每个杏子重(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)克,每个荔枝重(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)克。</span><br><br><span>7.&nbsp;</span><span>两支钢笔和一支圆珠笔共</span><span>16</span><span>元,一支钢笔和两支圆珠笔共</span><span>11</span><span>元。那么一支钢笔是(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)元。</span><br><br><span>8.&nbsp;</span><span>甲、乙、丙三个班共有学生</span><span>161</span><span>人,甲比乙班多</span><span>2</span><span>人,乙班比丙班多</span><span>6</span><span>人,乙班有(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)人。</span><br><br><span>9.&nbsp;</span><span>两筐同样重的水果,第一筐卖出</span><span>31</span><span>千克,第二筐卖出</span><span>19</span><span>千克后,第二筐是第一筐的</span><span>4</span><span>倍,则每筐原有水果(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)千克。</span><br><br><span>10.&nbsp;</span><span>把</span><span>99</span><span>只棋子分放在大小不同的两种盒子里,每个大盒子可装</span><span>12</span><span>只,每个小盒子可装</span><span>5</span><span>只,这样恰好装完。已知两种盒子的总数大于</span><span>10</span><span>,那么大盒子有(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个,小盒子有(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个。</span><br><br><span>11.&nbsp;</span><span>小明、小红、小青三位小朋友去钓鱼,数一数他们钓的鱼,发现小明钓的鱼是小红钓的</span><span>3</span><span>倍,小红钓的鱼比小青少</span><span>7</span><span>条,小青钓的鱼比小明少</span><span>9</span><span>条,小明钓到(</span><span>&nbsp;&nbsp;&nbsp;</span><span>)条鱼。</span><br><br><span>12.&nbsp;</span><span>甲、乙、丙、丁四人加工零件。已知丁比丙加工的多,甲、乙二人加工的总数比甲、丁二人加工的总数多,丙、丁二人加工的总数比甲、丁二人加工的总数多,则这四人按加工零件数从最多到最少的顺序为(</span><span>&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>13.&nbsp;</span><span>三个小朋友都有同样多的苹果,后来小明给小红、小亮几个苹果后,小红比小明多</span><span>7</span><span>个苹果,小亮比小红少</span><span>2</span><span>个苹果。小明给小红(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)个苹果,小明给小亮(</span><span>&nbsp;&nbsp;&nbsp;</span><span>)个苹果。</span><br><br><span>14.&nbsp;</span><span>如图有</span><span>8</span><span>条线段,至少要分别测量编号为(</span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span>)的三条线段的长度,才能求这个图形的周长。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2014/0710/2014710111922.jpg?m=0.9288420295342803"><br><div>&nbsp;<br></div></div>