2019年小学四年级数学《第四单元》测试试卷及答案

Word文档下载后可自行编辑1/12019年小学四年级数学《第四单元》测试试卷及答案36  ＜/span＞＜span＞154-54=＜/span＞＜br＞＜br＞＜span＞2.＜/span＞＜span＞用简便方法计算。＜/span＞＜br＞＜br＞＜span＞204×1572×99+72＜/span＞＜br＞＜br＞＜br＞＜span＞5×38×4×5＜/span＞＜span＞＜/span＞＜span＞    ＜/span＞＜span＞125×79＜/span＞＜br＞＜br＞＜br＞＜span＞67×101-67＜/span＞＜span＞    ＜/span＞＜span＞＜/span＞＜span＞ ＜/span＞＜span＞63×99＜/span＞＜br＞＜br＞＜span＞＜strong＞五、解决问题。＜/strong＞＜/span＞＜br＞＜br＞＜span＞1.＜/span＞＜span＞自行车厂装配一批自行车＜/span＞＜span＞,＜/span＞＜span＞原计划每天装＜/span＞＜span＞25＜/span＞＜span＞辆＜/span＞＜span＞,＜/span＞＜span＞需要＜/span＞＜span＞40＜/span＞＜span＞天完成。由于提高效率＜/span＞＜span＞,＜/span＞＜span＞实际＜/span＞＜span＞8＜/span＞＜span＞天完成＜/span＞＜span＞,＜/span＞＜span＞实际每天装多少辆＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜span＞2.＜/span＞＜span＞下面三种球各买一个＜/span＞＜span＞,＜/span＞＜span＞一共付多少元＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜imgsrc=//./uploadimages/2016/1017/2016101715249.png?m=0.45675865277752403＞＜br＞＜br＞＜span＞3.＜/span＞＜span＞ 永发超市运来＜/span＞＜span＞4＜/span＞＜span＞箱毛巾＜/span＞＜span＞,＜/span＞＜span＞每包＜/span＞＜span＞5＜/span＞＜span＞条。一共运来多少条毛巾＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜imgsrc=//./uploadimages/2016/1017/2016101715512.png?m=0.1299681397274124＞＜br＞＜br＞＜span＞4.＜/span＞＜span＞ 师傅和徒弟同时加工一种机器零件。师傅每时加工＜/span＞＜span＞42＜/span＞＜span＞个＜/span＞＜span＞,＜/span＞＜span＞徒弟每时加工＜/span＞＜span＞25＜/span＞＜span＞个。＜/span＞＜span＞4＜/span＞＜span＞时后＜/span＞＜span＞,＜/span＞＜span＞师傅和徒弟一共加工多少个零件＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜span＞5.＜/span＞＜span＞ 学校为＜/span＞＜span＞8＜/span＞＜span＞个班各配备了一台饮水机和一个纸篓＜/span＞＜span＞,＜/span＞＜span＞一共花了多少元＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜imgsrc=//./uploadimages/2016/1017/201610171563.png?m=0.4857291559754213＞＜br＞＜br＞＜span＞6.＜/span＞＜span＞ 合唱组有＜/span＞＜span＞84＜/span＞＜span＞人＜/span＞＜span＞,＜/span＞＜span＞合唱组的人数是美术组的几倍＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜imgsrc=//./uploadimages/2016/1017/2016101715640.png?m=0.4639422737187926＞＜br＞＜br＞＜br＞＜divstyle=text-align:center;＞＜strong＞＜fontcolor=#38761d＞2016年苏教版小学四年级数学《第四单元》测验卷解析＜/font＞＜/strong＞＜/div＞＜br＞＜span＞一、＜/span＞＜span＞1＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ 乘、除法＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞加、减法＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞小括号里面的＜/span＞＜br＞＜br＞＜span＞小括号外面的＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞小括号里面的＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞中括号里面的＜/span＞＜br＞＜br＞＜span＞2＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ 减＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞加＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞乘＜/span＞＜br＞＜br＞＜span＞3＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞44＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞24＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞99＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞172＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞64＜/span＞＜span＞(＜/span＞＜span＞解析不唯一＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞二、＜/span＞＜span＞1＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞✕＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞2＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞√＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞3＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ √＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞4＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞✕＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞5＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞✕＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞6＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞✕＜/span＞＜br＞＜br＞＜span＞三、＜/span＞＜span＞1＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞B＜/span＞＜span＞2＜/span＞＜span＞.＜/span＞＜span＞ ＜/span＞＜span＞A＜/span＞＜span＞3＜/span＞＜span＞.＜/span＞＜span＞ ＜/span＞＜span＞B＜/span＞＜span＞4＜/span＞＜span＞.＜/span＞＜span＞ ＜/span＞＜span＞A＜/span＞＜span＞5＜/span＞＜span＞.＜/span＞＜span＞ ＜/span＞＜span＞C＜/span＞＜br＞＜br＞＜span＞四、＜/span＞＜span＞1＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞81＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞0＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞8＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞80＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞10000＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞100＜/span＞＜br＞＜br＞＜span＞2＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞3060＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞7200＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞3800＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞9875＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞6700＜/span＞＜em＞＜span＞＜/span＞＜/em＞＜span＞6237＜/span＞＜br＞＜br＞＜span＞五、＜/span＞＜span＞1＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞25＜/span＞＜em＞＜span＞×＜/span＞＜/em＞＜span＞40＜/span＞＜em＞＜span＞÷＜/span＞＜/em＞＜span＞8＜/span＞＜em＞＜span＞=＜/span＞＜/em＞＜span＞125＜/span＞＜span＞(＜/span＞＜span＞辆＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞2＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞64＜/span＞＜em＞＜span＞+＜/span＞＜/em＞＜span＞78＜/span＞＜em＞＜span＞+＜/span＞＜/em＞＜span＞36＜/span＞＜em＞＜span＞=＜/span＞＜/em＞＜span＞178＜/span＞＜span＞(＜/span＞＜span＞元＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞3＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞4＜/span＞＜em＞＜span＞×＜/span＞＜/em＞＜span＞(＜/span＞＜span＞22＜/span＞＜em＞＜span＞×＜/span＞＜/em＞＜span＞5＜/span＞＜span＞)＜/span＞＜em＞＜span＞=＜/span＞＜/em＞＜span＞440＜/span＞＜span＞(＜/span＞＜span＞条＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞4＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞(＜/span＞＜span＞42＜/span＞＜em＞＜span＞+＜/span＞＜/em＞＜span＞25＜/span＞＜span＞)＜/span＞＜em＞＜span＞×＜/span＞＜/em＞＜span＞4＜/span＞＜em＞＜span＞=＜/span＞＜/em＞＜span＞268＜/span＞＜span＞(＜/span＞＜span＞个＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞5＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞(＜/span＞＜span＞125＜/span＞＜em＞＜span＞+＜/span＞＜/em＞＜span＞5＜/span＞＜span＞)＜/span＞＜em＞＜span＞×＜/span＞＜/em＞＜span＞8＜/span＞＜em＞＜span＞=＜/span＞＜/em＞＜span＞1040＜/span＞＜span＞(＜/span＞＜span＞元＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞6＜/span＞＜em＞＜span＞.＜/span＞＜/em＞＜span＞ ＜/span＞＜span＞84＜/span＞＜em＞＜span＞÷＜/span＞＜/em＞＜span＞[(＜/span＞＜span＞8＜/span＞＜em＞＜span＞+＜/span＞＜/em＞＜span＞6＜/span＞＜span＞)＜/span＞＜em＞＜span＞×＜/span＞＜/em＞＜span＞2＜/span＞＜span＞]＜/span＞＜em＞＜span＞=＜/span＞＜/em＞＜span＞3＜/span＞＜br＞＜br＞＜br＞＜divstyle=text-align:center;＞＜strong＞＜fontcolor=#ff0000＞2016年北师大版小学四年级数学《第四单元》测验卷＜/font＞＜/strong＞＜/div＞＜br＞＜span＞＜strong＞一、填上空题。＜/strong＞＜/span＞＜br＞＜br＞＜span＞1.＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞∶24=＜/span＞()/4=2÷()=0.5＜/div＞＜div＞＜br＞＜span＞2.＜/span＞＜span＞将＜/span＞＜span＞8∶13＜/span＞＜span＞的前项扩大到原来的＜/span＞＜span＞4＜/span＞＜span＞倍＜/span＞＜span＞,＜/span＞＜span＞要使比值不变＜/span＞＜span＞,＜/span＞＜span＞后项应增加＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞3.＜/span＞＜span＞甲数是乙数的＜/span＞＜span＞1.25＜/span＞＜span＞倍＜/span＞＜span＞,＜/span＞＜span＞甲数与乙数的最简单的整数比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞4.＜/span＞＜span＞某养鸡场公鸡的只数是母鸡的＜/span＞＜span＞,＜/span＞＜span＞公鸡与母鸡的只数比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞),＜/span＞＜span＞公鸡占鸡总只数的＜/span＞()/()。＜/div＞＜div＞＜br＞＜span＞5.＜/span＞＜span＞一个三角形的三个内角的度数比是＜/span＞＜span＞3∶2∶1＜/span＞＜span＞,＜/span＞＜span＞这个三角形内最大的角的度数是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞),＜/span＞＜span＞这是一个＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞三角形。＜/span＞＜br＞＜br＞＜span＞6.＜/span＞＜span＞两个正方体的棱长的比是＜/span＞＜span＞2∶3＜/span＞＜span＞,＜/span＞＜span＞棱长总和的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞),＜/span＞＜span＞表面积的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞),＜/span＞＜span＞体积的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞7.＜/span＞＜span＞月季花朵数的＜/span＞＜span＞是玫瑰花朵数的＜/span＞＜span＞,＜/span＞＜span＞玫瑰花的朵数与月季花的朵数的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞8.＜/span＞＜span＞从甲地到乙地＜/span＞＜span＞,＜/span＞＜span＞小王要＜/span＞＜span＞50＜/span＞＜span＞分钟＜/span＞＜span＞,＜/span＞＜span＞小李要＜/span＞＜span＞60＜/span＞＜span＞分钟＜/span＞＜span＞,＜/span＞＜span＞小王和小李所用时间的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞),＜/span＞＜span＞小李和小王的速度比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜strong＞＜span＞二、是非题。＜/span＞＜span＞(＜/span＞＜span＞对的画“＜/span＞＜span＞√＜/span＞＜span＞”＜/span＞＜span＞,＜/span＞＜span＞错的画“＜/span＞＜span＞✕＜/span＞＜span＞”＜/span＞＜span＞)＜/span＞＜/strong＞＜br＞＜br＞＜span＞1.＜/span＞＜span＞比的前项和后项同时乘或除以同一个数＜/span＞＜span＞,＜/span＞＜span＞比值不变。＜/span＞＜span＞＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞2.＜/span＞＜span＞甲数是乙数的2/3＜/span＞＜span＞,＜/span＞＜span＞甲数与乙数的比值就是2/3＜/span＞＜span＞。＜/span＞＜span＞＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞3.＜/span＞＜span＞比值是＜/span＞＜span＞0.75＜/span＞＜span＞的比有无数个。＜/span＞＜span＞＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞4.5＜/span＞＜span＞分＜/span＞＜span＞∶0.6＜/span＞＜span＞时＜/span＞＜span＞,＜/span＞＜span＞化简后的比是＜/span＞＜span＞5∶6＜/span＞＜span＞。＜/span＞＜span＞＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞5.＜/span＞＜span＞被减数与差的比是＜/span＞＜span＞8∶5＜/span＞＜span＞,＜/span＞＜span＞减数与差的比是＜/span＞＜span＞3∶5＜/span＞＜span＞。＜/span＞＜span＞＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜br＞＜strong＞＜br＞＜span＞三、选择题。＜/span＞＜span＞(＜/span＞＜span＞把正确解析的序号填在括号里＜/span＞＜span＞)＜/span＞＜/strong＞＜br＞＜br＞＜span＞1.＜/span＞＜span＞一本书＜/span＞＜span＞,＜/span＞＜span＞已看了总页数的3/5＜/span＞＜span＞,＜/span＞＜span＞剩下的页数与已看的页数的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞A.3∶5＜/span＞＜span＞       ＜/span＞＜span＞B.2∶5＜/span＞＜span＞       ＜/span＞＜span＞＜/span＞＜span＞  ＜/span＞＜span＞C.2∶3＜/span＞＜br＞＜br＞＜span＞2.＜/span＞＜span＞一个平行四边形与一个三角形的底的比是＜/span＞＜span＞1∶2＜/span＞＜span＞,＜/span＞＜span＞高的比是＜/span＞＜span＞1∶2＜/span＞＜span＞,＜/span＞＜span＞面积的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞A.1∶1＜/span＞＜span＞＜/span＞＜span＞        ＜/span＞＜span＞B.1∶2＜/span＞＜span＞＜/span＞＜span＞           ＜/span＞＜span＞C.1∶4＜/span＞＜br＞＜br＞＜span＞3.＜/span＞＜span＞某工厂从甲车间调出1/10＜/span＞＜span＞的人给乙车间＜/span＞＜span＞,＜/span＞＜span＞甲、乙两车间的人数正好相等。原来甲、乙两车间的人数比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞A.10∶9＜/span＞＜span＞＜/span＞＜span＞       ＜/span＞＜span＞B.5∶4＜/span＞＜span＞＜/span＞＜span＞               ＜/span＞＜span＞C.11∶10＜/span＞＜br＞＜br＞＜span＞4.120＜/span＞＜span＞克盐水中含盐＜/span＞＜span＞20＜/span＞＜span＞克＜/span＞＜span＞,＜/span＞＜span＞盐与水的质量比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞A.1∶5＜/span＞＜span＞＜/span＞＜span＞       ＜/span＞＜span＞B.1∶6＜/span＞＜span＞＜/span＞＜span＞              ＜/span＞＜span＞C.5∶6＜/span＞＜br＞＜br＞＜span＞5.＜/span＞＜span＞同修一条路＜/span＞＜span＞,＜/span＞＜span＞甲队＜/span＞＜span＞2＜/span＞＜span＞小时修＜/span＞＜span＞7＜/span＞＜span＞千米＜/span＞＜span＞,＜/span＞＜span＞乙队＜/span＞＜span＞3＜/span＞＜span＞小时修＜/span＞＜span＞10＜/span＞＜span＞千米＜/span＞＜span＞,＜/span＞＜span＞甲、乙两队的工作效率的比是＜/span＞＜span＞(＜/span＞＜span＞＜/span＞＜span＞)＜/span＞＜span＞。＜/span＞＜br＞＜br＞＜span＞A.20∶21＜/span＞＜span＞  ＜/span＞＜span＞＜/span＞＜span＞   ＜/span＞＜span＞B.21∶20＜/span＞＜span＞   ＜/span＞＜span＞＜/span＞＜span＞       ＜/span＞＜span＞C.7∶10＜/span＞＜br＞＜strong＞＜br＞＜span＞四、先化简下面各比＜/span＞＜span＞,＜/span＞＜span＞再求比值。＜/span＞＜/strong＞＜br＞＜br＞＜imgsrc=//./uploadimages/2016/1017/20161017151250.png?m=0.9227836238124485＞＜br＞＜br＞＜span＞＜strong＞五、解决问题。＜/strong＞＜/span＞＜br＞＜br＞＜span＞1.＜/span＞＜span＞王大爷栽了杨树和柳树共＜/span＞＜span＞400＜/span＞＜span＞棵＜/span＞＜span＞,＜/span＞＜span＞杨树与柳树棵数的比是＜/span＞＜span＞5∶3＜/span＞＜span＞,＜/span＞＜span＞杨树、柳树各栽了多少棵＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜span＞2.＜/span＞＜span＞某种混凝土是黄沙、水泥和石子按＜/span＞＜span＞4∶3∶5＜/span＞＜span＞搅拌而成的＜/span＞＜span＞,＜/span＞＜span＞一个建筑工地需混凝土＜/span＞＜span＞60＜/span＞＜span＞吨＜/span＞＜span＞,＜/span＞＜span＞需黄沙、水泥、石子各多少吨＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜span＞3.＜/span＞＜span＞一种药水是药粉和水按＜/span＞＜span＞1∶30＜/span＞＜span＞的比配成的＜/span＞＜span＞,＜/span＞＜span＞现在有药粉＜/span＞＜span＞30＜/span＞＜span＞千克＜/span＞＜span＞,＜/span＞＜span＞可以配制多少千克的药水＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜span＞4.＜/span＞＜span＞小明的妈妈按同样的比准备＜/span＞＜span＞420＜/span＞＜span＞克早餐＜/span＞＜span＞,＜/span＞＜span＞各种食物分别要准备多少克＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜imgsrc=//./uploadimages/2016/1017/2016101715145.png?m=0.1590471540319116＞＜br＞＜br＞＜span＞5.＜/span＞＜span＞甲、乙两车分别从相距＜/span＞＜span＞560＜/span＞＜span＞千米的两地相对开出＜/span＞＜span＞,＜/span＞＜span＞经过＜/span＞＜span＞8＜/span＞＜span＞小时相遇＜/span＞＜span＞,＜/span＞＜span＞已知两车的速度比是＜/span＞＜span＞4∶3＜/span＞＜span＞,＜/span＞＜span＞ 两车的速度各是多少＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜span＞6.＜/span＞＜span＞图书室买来＜/span＞＜span＞540＜/span＞＜span＞本新书＜/span＞＜span＞,＜/span＞＜span＞其中＜/span＞＜span＞是连环画＜/span＞＜span＞,＜/span＞＜span＞其余的是文艺书和科技书＜/span＞＜span＞,＜/span＞＜span＞文艺书和科技书的本数的比是＜/span＞＜span＞3∶2＜/span＞＜span＞。三种书各有多少本＜/span＞＜span＞?＜/span＞＜br＞＜br＞＜span＞＜strong＞六、附加题。＜/strong＞＜/span＞＜br＞＜br＞＜span＞一瓶盐水＜/span＞＜span＞,＜/span＞＜span＞盐和水的质量比是＜/span＞＜span＞1∶24＜/span＞＜span＞,＜/span＞＜span＞如果再放入＜/span＞＜span＞75＜/span＞＜span＞克水＜/span＞＜span＞,＜/span＞＜span＞那么盐和水的质量比是＜/span＞＜span＞1∶27＜/span＞＜span＞,＜/span＞＜span＞原来瓶内的盐水有多少克＜/span＞＜span＞?＜/span＞＜br＞＜span＞ ＜/span＞＜br＞＜br＞＜divstyle=text-align:center;＞＜strong＞＜fontcolor=#38761d＞2016年北师大版小学四年级数学《第四单元》测验卷参考解析＜/font＞＜/strong＞＜/div＞＜br＞＜span＞一、＜/span＞＜/div＞＜div＞＜span＞1＜/span＞、＜span＞122 4＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞2＜/span＞、＜span＞39＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞3＜/span＞、＜span＞5∶4＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞4＜/span＞、＜span＞3∶5 3/8＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞5＜/span＞、＜span＞90°＜/span＞＜span＞  ＜/span＞＜span＞直角＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞6＜/span＞、＜span＞2∶34∶98∶27＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞7＜/span＞、＜span＞9∶10＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞8＜/span＞、＜span＞5∶65∶6＜/span＞＜br＞＜br＞＜span＞二、＜/span＞＜span＞1＜/span＞＜span＞.＜/span＞＜span＞✕＜/span＞＜span＞＜/span＞＜span＞2＜/span＞＜span＞.＜/span＞＜span＞√＜/span＞＜span＞＜/span＞＜span＞3＜/span＞＜span＞.＜/span＞＜span＞√＜/span＞＜span＞＜/span＞＜span＞4＜/span＞＜span＞.＜/span＞＜span＞✕＜/span＞＜span＞＜/span＞＜span＞5＜/span＞＜span＞.＜/span＞＜span＞√＜/span＞＜br＞＜br＞＜span＞三、＜/span＞＜span＞1＜/span＞＜span＞.C＜/span＞＜span＞2＜/span＞＜span＞.B＜/span＞＜span＞3＜/span＞＜span＞.B＜/span＞＜span＞4＜/span＞＜span＞.A＜/span＞＜span＞5＜/span＞＜span＞.B＜/span＞＜br＞＜br＞＜span＞四、＜/span＞＜span＞5∶25/2＜/span＞＜span＞1∶41/4＜/span＞＜span＞7∶67/6＜/span＞＜span＞3∶13＜/span＞＜span＞ ＜/span＞＜/div＞＜div＞＜span＞＜br＞＜/span＞＜/div＞＜div＞＜span＞7∶171∶31/3＜/span＞＜span＞7∶27/2＜/span＞＜span＞5∶15＜/span＞＜br＞＜br＞＜span＞五、＜/span＞＜span＞1＜/span＞＜span＞.5+3=8＜/span＞＜span＞杨树＜/span＞＜span＞:＜/span＞＜span＞400×＜/span＞＜span＞=250＜/span＞＜span＞(＜/span＞＜span＞棵＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞柳树＜/span＞＜span＞:＜/span＞＜span＞400×＜/span＞＜span＞=150＜/span＞＜span＞(＜/span＞＜span＞棵＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞2＜/span＞＜span＞.4+3+5=12＜/span＞＜span＞黄沙＜/span＞＜span＞:＜/span＞＜span＞60×4/12＜/span＞＜span＞=20＜/span＞＜span＞(＜/span＞＜span＞吨＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞水泥＜/span＞＜span＞:＜/span＞＜span＞60×3/12＜/span＞＜span＞=15＜/span＞＜span＞(＜/span＞＜span＞吨＜/span＞＜span＞)＜/span＞＜span＞＜/span＞＜span＞石子＜/span＞＜span＞:＜/span＞＜span＞60×5/12＜/span＞＜span＞=25＜/span＞＜span＞(＜/span＞＜span＞吨＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞3＜/span＞＜span＞.30×＜/span＞＜span＞(＜/span＞＜span＞1+30＜/span＞＜span＞)＜/span＞＜span＞=930＜/span＞＜span＞(＜/span＞＜span＞千克＜/span＞＜span＞)＜/span＞＜br＞＜br＞＜span＞4＜/span＞＜span＞.100∶50∶200=2∶1∶42+1+4=7＜/span＞＜br＞＜br＞＜span＞面包＜/span＞＜span＞:＜/span＞＜span＞420×2/7＜/span＞＜