小学五年级奥数练习题(2)及参考答案(4)

343千克，拿出几个零件后，剩下的净重301千克，一个零件的重量是几千克？

13、动物园的饲养员给三群猴子分花生，如果只分给第一群，则每只猴子可得12粒，如果只分给第二群，则每只猴子可得15粒，如果只分给第三群，则每只猴子可得20粒，那么平均分给三群猴子，每只可得多少粒？

14、爷爷对小明说：“我现在的年龄是你的7倍，过几年是你的6倍，再过若干年就分别是你的5倍，4倍，3倍，2倍。”爷爷和小明现在分别是几岁？

图形的面积计算

1、如图所示，三角形ABC的面积为1，并且A E=3AB，B D=2 BC，那么，三角形B D E的面积是多少？

2、如图所示，在三角形ABC中，B D=1 / 3 BC，三角形ABC的面积是1平方厘米，那么三角形A D C的面积是多少平方厘米？

3、如图所示，在三角形ABC中，A D=1 / 3 AB，B E= EF= F C，C G= 1 / 3 C A，阴影部分面积占三角形ABC面积的几分之几？

4、如图所示，B D=1 / 3 BC，三角形ABC的面积是48平方厘米， A C=16厘米，A E=11厘米，三角形A D E的面积是多少？

5、如图所示，A E=1 / 5AC，CD=1 / 4 BC，B F=1 / 6AB，求三角形 DEF与三角形ABC的面积之比。

6、如图所示，把三角形ABC的B A边延长1倍到D点，AC边延长3倍到F点，C B边延长2倍到E点，连接DE、EF、F D，得到三角形DEF，它的面积是54平方厘米，三角形ABC的面积是多少？

7、如图所示，设BD、DE、E C的长分别是2、4、2，F是线段A E的中点，三角形ABC的边BC上的高为4，求三角形DEF的面积。

8、如图所示，三角形ABC的面积是1，A E= E D，BD=2 /3 BC，求阴影部分的面积。

9、如图，ABCD是平行四边形，三角形E AB是直角三角形，AB=80米，E B=70米，阴影部分比三角形EFH的面积大120平方米，则 H B长多少米？

10、如图，两个正方形地块，边长分别是80米和40米，那么阴影部分的面积是多少平方米？

11、如图，在三角形ABC中，CD=2 BD，CE=3 AE，阴影部分的面积是20平方米，那么三角形A B D与E CD的面积之和是多少？

12、如图，已知正方形甲的边长是50米，正方形乙的边长是40米，则图中阴影部分的面积是多少平方米？

Class: Name:

( )1. Good morning! ! A.Morning ! B.Hello ! C.Hi !

( )2. Nice to see you again ! .

A.How are you ? B.Nice to see you , too . C.How do you do ? ( )3.Good night,mom !

A.Night ! B.Good night ! C.Good evening . ( )4.How do you do ?

A.How are you ? B.Fine,thanks . C.How do you do ? ( )5.How many story books do you have ? A.I have 10. B.I can see 10. C.Thirty yuan. ( )6.Do you have new teachers? A.Yes,we do . B.Yes,we don’t. C.Yes,we have . ( )7.Who’s your art teacher ? A.Mr Zhu. B.Miss Zhu. C.He’s tall. ( )8.What’s he like? A.He’s tall and strong . B.Yes,he is. C.Mr Zhu. ( )9.Is your English teacher young? A.No,she isn’t. B.Yes,she is . C.No,she is. ( )10. ? Her name is Chen Jie.

A.What’s your name ? B.What’s she name ? C.What’s her name ? ( )11. ? I like Chinese,math and English.

A.What classes do you like? B.What do you like? C.What are you like ? ( )12. ? We have English and P.E. A.What do you have on Mondays ? B.What do you have ? C.What do you have on Monday?

( )13. ? It’s Monday.

A.What is it today ? B.What day is it today ? C.What day is today ? ( )14. ? I watch TV and do my homework. A.What do you do ? B.What do you do in Mondays? C.What do you do on Sundays ?

( )15.May I have a look ? A.Sure.Here you are . B.Look ! C.Here you are . ( )16.Our math teacher is Canada. A.from B.in C.at

( )17.I three new teachers. A.has B.am C.have

( )18.What’s Chinese teacher like ? A.you B.your C.you’re

( )19.My P.E.teacher is thin. A.too B.so C.very

( )20.There are days in a week. A.six B.seven C.eight

( )21.There are month(月)in a year(年). A.ten B.eleven C.twelve

( )22.I often watch TV Saturday . A.on B.in C.at

( )23.I like P.E. I don’t lime music. A.but B.and C.so

( )24.This is apple. It is red apple. A.a , a B.an,an C.an, a

( )25.What do you like ? A.classes B.class C.class’s 六年级英语测试题

Class: Name: ( )1. How are you ?

A.Fine,thanks. B.Yes,it is. C.How are you ? ( )2. Nice to meet you !

A.Fine,thank you. B.OK. C.Nice to meet you ,too ! ( )3. How do you go to school ?

A.I go to Canada by plane. B.I go to school by bike. C.What about you ? ( )4. How do you go to the USA ?

A.I usually go to school by bus. B.I go to England by ship. C.I go by plane. ( )5. ? My home is near the post office. A. Where is your home ? B.OK. C.See you then! ( )6. See you at 2 o’clock. A.See you then ! B.The fifth floor. C.It’s easy. ( )7. ? You can go by the No.15 bus. A.It’s not far. B. How can I get to Zhongshan Park ? C.Sure. ( )8. Where is the hospital?

A.Next to the cinema. B.Thank you . C.You’re welcome.

( )9. Excuse me ,is there a cinema near here ? A.Yes,there is . B.No,it’s not far. C.It’s near the post office. ( )10.? ? It’s near the post office. A.Yes,there is . B.No,it’s not far. C. Where is the library? ( )11. ? It’s next to the hospital.

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