<div style="text-align: center;"><strong><font color="#ff0000">2017年小学四年级下册数学期中试卷</font></strong></div><div style="text-align: center;"><br></div><span><div style="text-align: center;">(时间:80分钟 共计100分)</div></span><div><br></div><div><img src="//www.szxuexiao.com/uploadimages/2017/0502/201752112443.png?m=0.007602524281655532"><br></div><div><br></div><div><strong><span>一.</span><span>填空(每空0.5分,共16分)</span></strong><br><br><span>1.</span><span>65</span><span>+</span><span>360</span><span>÷</span><span>(</span><span>20</span><span>-</span><span>5</span><span>),先算( </span><span> </span><span> ),再算( </span><span> </span><span> ),最后算( </span><span> </span><span> )</span><span>,</span><span>得数是</span><span>( </span><span> </span><span> )</span><span>。</span><br><br><span>2.</span><span>已知两个因数的积与其中一个因数,求另一个因数,用</span><span>( )</span><span>法。</span><br><br><span>3</span><span>.</span><span>按照三角形内角的大小来分类,可以分为(</span><span> </span><span>),(</span><span> </span><span>),(</span><span> </span><span> </span><span> </span><span>)</span><span>.</span><span>等腰三角形是(</span><span> </span><span> </span><span> </span><span>)对称图形,(</span><span> </span><span>)是等边三角形,等边三角形的</span><span>3</span><span>个内角都是(</span><span> </span><span> </span><span> </span><span>)</span><span>。</span><br><br><span>4</span><span>.</span><span>15+10=25 25</span><span>×</span><span>3=75 1800</span><span>÷75=24 列综合算式是( )。</span><br><br><span>5.4 × 12 + 24 ÷ 6 添上括号,使其运算顺序是:加—除—乘.则加了括号的算式是( )。</span><br><br><span>6.25×76+76×75的简便方法第一步是( ),利用了乘法的( )(填运算律); 计算102×78的时候,应先把( )看成( ),再用( )(填运算律)计算就会比较简便。</span><br><br><span>7.一个因数是8,积是72,要使积变成720,则另一个因数应该( );积是75,一个因数扩大10倍,另一个因数缩小5倍,则积变成( )。</span><br><br><span>8.等腰三角形中,顶角是10°,则这个三角形的一个底角是( )。</span><br><br><span>9.要判断2厘米、3厘米、8厘米的三根小棒能否围成三角形,则只需要判断( )能否大于( )就可以做出判断了。</span><br><br><span>10.用一根36厘米的铁丝,折成底边是12厘米的等腰三角形,则此三角形的顶角是( )度.在一个直角三角形中,其中一个角是28°,则另外一个锐角是( )度。</span><br><br><span>11.小华在班上的位置用数对表示是(3,3),小兰在班上的位置用数对表示是(3,4),小芳在班上的位置用数对表示是(4,4),( )坐在( )的前面,( )坐在( )的左面。</span><br><br><span>12.如图,</span><span>其中有(</span><span> </span><span> </span><span> </span><span>)个三角形,有(</span><span> </span><span> </span><span> </span><span>)个直角三角形,有(</span><span> </span><span> </span><span> </span><span>)个钝角三角形</span><span>。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2017/0502/201752112651.png?m=0.5783294481290568"><br><br><span><strong>二.擦亮你的眼睛.(在正确说法的后面的括号里打上√,在错误的说法后的括号里打×)(10分)</strong></span><br><br><span>1.(36÷4+11)÷5的运算顺序是从左到右依次算。( )</span><br><br><span>2.在任何情况下,一个因数不变,另一个因数扩大5倍,积也扩大5倍</span>。( )</div><div><br><span>3.105÷5=21 我们就说105能整除5。( )</span><br><br><span>4.计算25×32×125,要使计算更简便,则要用乘法分配律。( )</span><br><br><span>5.由3条线段组成的图形叫做三角形。( )</span><br><br><span>6.任意一个三角形至多有一个直角,至少有一个锐角。( )</span><br><br><span>7.所有等边三角形一定是等腰三角形, 等腰三角形一定是锐角三角形。( )</span><br><br><span>8.直角三角形可能是等腰三角形。( )</span><br><br><span>9.三角形任意两内角之和一定大于第三个角。( )</span><br><br><span>10.顶角是60°的等腰三角形一定是等边三角形。( )</span><br><strong><br><span>三</span><span>.</span><span>选择题</span><span>.</span><span>(将正确答案选在括号里)(5分)</span><span>.</span></strong><br><br><span>1</span><span>.</span><span>下面(</span><span> </span><span>)题用乘法分配律会使计算更简便</span><span>。</span><br><br><span>A.</span><span>.</span><span>35+78+65 B</span><span>.</span><span>76</span><span>×</span><span>125</span><span>×</span><span>8 </span><span> </span><span>C</span><span>.</span><span>32</span><span>×</span><span>25</span><span>×</span><span>125 D</span><span>.</span><span>98</span><span>×</span><span>45</span><br><br><span>2.</span><span>下面算式中,除数不能整除被除数的是(</span><span> </span><span>)。</span><br><br><span>A</span><span>.</span><span> 45</span><span>÷</span><span>1 B</span><span>.</span><span>120</span><span>÷</span><span>30 C</span><span>.</span><span> 300</span><span>÷</span><span>40 D</span><span>.</span><span>108</span><span>÷</span><span>3</span><br><br><span>3.</span><span>下面四根小棒中,哪三根不能围成一个三角形(</span><span> </span><span>)。</span><br><br><span>①</span><span>10</span><span>厘米</span><span> </span><span>②</span><span>8</span><span>厘米</span><span> </span><span>③</span><span>3</span><span>厘米</span><span> </span><span>④</span><span>7</span><span>厘米</span><br><br><span>A</span><span>.</span><span>①</span><span> </span><span>②</span><span> </span><span>③</span><span> B</span><span>.</span><span>② ③ ④ </span><span>C</span><span>.</span><span>① ②</span><span> </span><span>④ </span><span>D.</span><span>① ③ ④</span><br><br><span>4.在一个三角形中,有一个角是38度,另两个角可能是( )。</span><br><br><span>A</span><span>.</span><span>65° 82° </span><span>B</span><span>.</span><span>79 ° 72° </span><span>C.</span><span>38° 114° </span><span>D</span><span>.</span><span>52° 90°</span><br><br><span>5.两个数相乘,一个因数扩大3倍,另一个因数也扩大3倍,积( )。</span><br><br><span>A.扩大3倍 B.不变 C.扩大6倍 D.扩大9倍</span><br><br><span><strong>四.计算:</strong></span><br><br><span>1.直接写出得数。(5分)</span><br><br><span>95+125= 240÷60= 0÷11= 128÷4= 310-75= </span><br><br><span>460÷20= 75×4= </span><span>420÷70= 4</span><span>×32×5= 70×20=</span><br><br><span>2.笔算下列各题。(6分)</span><br><br><span>305×44= 2525÷25= 167×67= </span><br><br><span>3.计算下列各题,能用简便方法的就要简算。(27分)</span><br><br><span>101×68 48×125 344×63+37×344</span><br><br><span> </span><br><span>98×45 (25+20)×4 (100+153÷3)×5 </span><br><br><br><br><span>21×﹝(75+153)÷38﹞ </span><span>1301+405÷45</span><span> </span><span>1300</span><span>÷</span><span>25</span><span>÷</span><span>4</span><span> </span><br><br><span> </span><br><br><span>4、列式计算。(6分) </span><br><br><span>(1)640除以32的商,加上18,再乘以10,积是多少?</span><br><br><span> </span><br><span>(2)35与25的和再乘它们的差,积是多少?</span><br><br><br><span><strong>五.解决问题.(每题5分,共25分)</strong></span><br><br><span>1.波斯猫有1500克,非洲熊的重量是波斯猫的重量的12倍还多1000克,非洲熊有多少千克?</span><br><br><span>2.</span><span>在一个等腰三角形中,其中一个底角是44°,则这个等腰三角形的顶角是多少度?</span><br><br><span>3.师傅和徒弟二人共同加工1000个零件,师傅每小时加工20个,徒弟每时加工10个,他们共同工作10时后,师傅有事离开,由徒弟一人做,徒弟还需要工作多少小时?</span><br><br><span>4.清理1吨垃圾15元,张师傅和刘师傅共清除108吨垃圾。张师傅每天清理8吨,工作3天后,刘师傅加入共同用了6天完成了任务。张师傅和刘师傅各应得多少元?</span><br><br><span>5. AB两地相距800千米,甲乙两车分别从AB两地相向而行,甲每小时行30千米,乙每小时行50千米,相遇后甲车停止,乙车按照原来的速度继续行使,12时两车相距多少千米?</span><br><br><div style="text-align: center;"><strong><font color="#38761d"><br></font></strong></div><strong><div style="text-align: center;"><strong><font color="#38761d">2017年小学四年级下期期中测试答案</font></strong></div></strong><br><strong><span>一.</span><span>填空(每空0.5分,共16分)</span></strong><br><br><span>1.20-5=15 360÷15=24 65+24=89</span><br><br><span>2. 除法</span><br><br><span>3.锐角三角形 直角三角形 钝角三角形 轴 三条边都相等的三角形 60°</span><br><br><span>4. 1800÷﹝(15+10)×3﹞</span><br><br><span>5. 4 ×﹝(12+24)÷6﹞</span><br><br><span>6. 76×(25+75) 结合律 102 100+2 乘法分配律</span><br><br><span>7. 扩大10倍 150</span><br><br><span>8. 85°</span><br><br><span>9. 2+3=5厘米 8厘米</span><br><br><span>10. 60 62 </span><br><br><span>11. 小华 小兰 ; 小芳 小兰</span><br><br><span>12. 5 3 2 </span><br><br><strong><span>二.</span><span>判断:(每题1分,共10分)</span></strong><br><br><span>1. × 2. × 3. × 4. √ 5. × 6.× 7. × 8. √ 9. × 10. √ </span></div><div><span><br></span></div><div><span><strong>三</strong></span><strong>.</strong><span><strong>选择:(每题1分,共5分)</strong></span><br><br><span>1.C 2. C 3.D 4. D 5.D </span><br><br><strong><span>四</span>.<span>计算:</span></strong><br><br><span>1.(每个0.5分,共5分)</span><br><br><span>220 4 0 32 235 </span><br><br><span>23 300 6 640 1400 </span><br><br><span>2.(每题2分,共6分)</span><br><br><span>13420 101 11189</span><br><br><span>3.(每题3分,共27分)</span><br><br><span>6868 6000 34400</span><br><br><span>4410 180 755 </span><br><br><span>126 1310 13 </span><br><br><span>4.(每题三分,共6分)</span><br><br><span>(1)(640÷32+18)×10 = 380</span><br><br><span>(2)( 35+25)×(35-25)=600</span><br><br><span><strong>五.解决问题;(每题5分,共25分)</strong></span><br><br><span>1.1500</span><span>×</span><span>12+1000=19000克=19千克</span><br><br><span>2.180-44-44=92 °</span><br><br><span>3.1000-(20+10)</span><span>×</span><span>10=700个 700</span><span>÷10=70小时</span><br><br><span>4.张师傅8×(3+6)==72吨72×15=1080元</span><br><br><span>刘师傅108-72=36吨 36×15=540元</span><br><br><span>5. 800÷(30+50)=10小时</span><br><br><span>50×(12-10)=100千米</span><br><span> </span><br></div>
四年级下