内容发布更新时间 : 2024/12/29 0:02:50星期一 下面是文章的全部内容请认真阅读。
学校 姓名 班级___________ 座位号 ……装…………订…………线…………内…………不…………要…………答…………题……
hictures, and —、口算。(1 分×8=8 分)
4351491= ÷6= ×= ÷=8771510327133152÷= ×0.5= ÷= ××=567310454×
二、认真读题,准确填写。 (每空1分,共20分)
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1.2017年12月6日,我国首条穿越秦岭山脉的高速铁路——西成高铁开通运营,它打通了西北和西南的高铁网络,使整个西部高铁连成一片。原来成都到西安的铁路运行时间约为10小时,现在乘坐高铁仅需原来时间的2.
2,现在乘坐高铁需要( )小时。5his article includes some parts, including text, pictures, and
24( ) = =( ):( )(填最简单的整数比)=( )% =( )(填小数) 1510333.一根铁丝长1.5 m,剪下它的,还剩( )m;如果剪下m,还剩( )m。
55his article includes some parts, including text, pictures, and4.研究发现,8岁以上儿童按照5:3安排一天的活动和睡眠时间是最合理的,8岁以上儿童一天的睡眠时间是( )小时最合理。
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),含水率是(
)。
5.取稻谷500g,烘干后还有425g,这种稻谷的烘干率是( 6.阅读下面的短文并回答问题。
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我国的水资源总量约为2.8万亿立方米。由于人口众多,人均占有水资源只有2300立方
111米,仅为美国的,巴西的,加拿大的。另外,我国水资源分布很不均匀,据统计,南
51048方的土地资源大约占全国的40%,水资源却占全国的80%;北方的土地资源大约占全国的60%,水资源却只有全国的20%。
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(1)美国人均占有水资源( (2)我国北方的水资源有(
)立方米。 )亿立方米。
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(3)请你提出一个数学问题并列式解答。
his article includes some parts, including text, pictures, and 问题:( ) 列式解答:(
)
)m,占地面积是( )m2。
7.一个半圆形的养鱼池,直径是16m,它的周长是(
8.如下图,已知圆的周长是37.68cm,圆的面积等于长方形的面积。阴影部分的面积是 (
)cm2。
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9.下图中第5个正方形有( )个点子。如果某个正方形每边上的点子数用a表示,则这个正方形的点子总数可以表示为(
)。
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三、反复比较,合理选择。(把正确答案的序号填在括号里)(2分×6=12分)
11.李莉看一本180页的少儿版《三国演义》,第一天看了全书页数的,第二天看了全书页数
61的,第三天从第几页看起?下面列式正确的是( )。 5111111A.180××+1 B.180×(+)+1 C.180×(1――)
6565654612.如果a×=b×=c÷,a、b、c均大于0,那么,将a、b、c按从大到小的顺序
552his article includes some parts, including text, pictures, andhis article includes some parts, including text, pictures, and排列,为( )。
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his article includes some parts, including text, pictures, andA. a>b>c B.b>a>c C.c>a>b
3.加工一批零件,师傅每小时完成这批零件的时完成?下面列式正确的是( )。A.
his article includes some parts, including text, pictures, and1,徒弟单独完成需要16小时,师徒合作几小10
his article includes some parts, including text, pictures, and111×16 B. 1÷(10+16) C.1÷(+)101016
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4.某种电子产品4月的价格比3月涨了10%,5月的价格比4月又降了10%。此时的价格与3月的价格相比较,( )。
his article includes some parts, including text, pictures, andA.降了1% B.价格不变 C.涨了1%
5.下图中两个正方形的边长相等,观察两个图中的阴影部分,它们的周长和面积的大小关系是( )。
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A.周长相等,面积不相等 B.周长和面积都相等 C.面积相等.周长不相等
6.周六上午,张伟步行到离家800 m远的街心花园锻炼身体,20分钟后到达目的地。他在双杠上锻炼了10分钟,然后用5分钟时间跑步到家。下面各图中,能正确描述张伟离家时间和离家距离关系的是( )。
四、巧用方法,细心计算。(3分×5=15分)
( 88×
五、观察思考,动手操作。(第1题4分,第2题5分,第3题7分,共16分) 1.画出两个大小不等的圆,使它们组成的图形有无数条对称轴。
2.在下图中涂上阴影,使阴影部分的面积比空白部分少75%。
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1585182-)÷ -×(÷)
9849321216752 2.4÷+0.6× 解方程:x-x=2.6 875715