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2019սʦƸСѧѧģ

2019-06-05 15:52:53|

һѡ

1.һ3.5Сʱʻ224ǧף㣬ʻ320ǧҪСʱ?ȷ( ).

A.1.8Сʱ B.64Сʱ C.5Сʱ D.10Сʱ

2.һλС뱣һλСõ4.9λС( ).

A.4.85 B.4.94 C.4.89 D.4.88

3.ͼУԳ( ).

A.ȱ B.Բ C. D.

4.ڽУ∠1∠2∠3=123ôһ( ).

A. B.۽ C.ֱ D.ȷ

5.˵ȷ( ).

A.ֱ߱߳

B.ƽһֱ

C.һ뵽λ1099999

D.УԼ5000ˣ5000һ

6.һʻʱ·.

ʱ/ʱ123456

·/km70140210280350420

۲ϱ˵ȷ( ).

A.ٶһʻ·ʱϵ

B.ٶȣ10Сʱʻ700ǧ

C.ٶȣʻ245ǧҪ4.5Сʱ

7.кڡסɫƤ19֪ɫƤĸǺɫƤ5ɫƤĸ( ).

A.13 B.7 C.9 D.1

8.ѳ7ף5ף3׵ijװһ( )ƽװװֽʡ.

A.127 B.242 C.214 D.254

9.һЩ6ס4׵ijֽƴһΣҪ( ).

A.4 B.6 C.8 D.24

10.ռҵ԰300ף1/ٶȴӼȥ԰Ȼ3/ٶȴӹ԰ؼңôƽٶ( ).

A.2/ B.2.4/ C.1.5/ D.1.8/

11.סı23ҡı45סı________.

12.һͲѵij42%һեͳե2100ǧ˲ͣ_____ǧͲ.

13.ͼεı߳Ϊ20ףӰֵ_____ƽ.

 

 

14.0.72550.7572.5%

մӴС˳Уڵλ_____.

 

15.Ȼ123…99ֳ飬ÿһƽǡöȣôƽij˻________.

16.һܳ50.24׵Բλ̳ҪΧ2׿ʯ·ʯ·________ƽ.

17.һ·ɼ׶ӵޣ24;Ҷӵޣ36꣬Ҷ6죬ʣµӺޣҪ?

18.һԲӾأܳΪ62.8ף2.

(1)ڳڲͳصĨˮ࣬Ĩˮƽ?

(2)ˮؿ0.5ףʱˮж?

19.һҹסִ40Ԫÿ踶Ϣ2.376ԪִΪ6.00%ִΪ5.60%ҹסִǶԪ?

20.ijСķԭÿƽ5000Ԫ20%

(1)ڷӵۼÿƽ׶Ԫ?

(2)򷿻1.5%˰Сһ120ƽ׵ķӣּӦ˰Ԫ?

(3)ȫֽ򣬿ܾ۵ŻݣŻݺʵʹ120ƽ׵ķӹԪ?(˰)

21.һӷָȫˣ˷4ÿ˷24;һ˷6ÿ˷4ȱ12Ӷٸ?ȫҹж?

22.СעˮܣΪ350Ŀճעˮÿעˮ15ûйغˮܣÿˮ25ӺСˮܹغãճעһҪٷ?

Сѧѧģο

һѡ

1.𰸡C.320÷(224÷3.5)=320÷64=5(Сʱ)ʴΪC.

2.𰸡B.һλС뱣һλСõ4.9λСDz“”õģλСİٷλϵ4λС4.94ʴΪB.

3.𰸡D.ȱԳᣬԲһԳᣬԳᣬԳᣬԣζԳ࣬ѡD.

4.𰸡C.1+2+3=6180°×

=90°Ϊڽ90°ֱΣѡC.

5.𰸡D.Aֱߺ߶޷ԭ˵;Bƽһǣһɵģֱɵģԭ˵;Cһ뵽λ10104999ԭ˵;DУԼ5000ˣ5000һ˵ȷѡD.

6.𰸡C.Ϊ701=1402=2103=2804=3505=4206ٶһʻ·ʱϵAȷ;Ϊ70×10=700(ǧ)ٶȣ10Сʱʻ700ǧףBȷ;Ϊ245÷70=3.5(Сʱ)ʻ245ǧҪ3.5СʱC󣬹ѡC.

7.𰸡C.1ʱΪ1×5=5()Ϊ1915=13()

2ʱΪ2×5=10()Ϊ19210=7()

3ʱΪ3×5=15()Ϊ19315=1()

4ʱΪ4×5=20()ڡĸ>19ì.

ɫƤĸ9ѡC.

8.𰸡A.װһƴɵ³ij߷ֱǣ7ס5ס6ף(7×5+7×6+5×6)×2=(35+42+30)×2=107×2=214(ƽ)ѡC.

9.𰸡B.4=2×26=2×364СΪ2×2×3=12εı߳12ף(12÷6)×(12÷4)=2×3=6()Ҫ6ţѡB.

10.𰸡C.ƽٶ=·

ʱ=

=1.5(/).

11.𰸡815.ף=23=812ң=45=1215

ˣףң=81215ɴ˵õף=815ʴΪ815.

12.𰸡5000.2100÷42%=2100÷0.42=5000(ǧ)ʴΪ5000.

13.𰸡86.20×203.14×

=4003.14×100=400314=86(ƽ)Ӱֵ86ƽףʴΪ86.

14.𰸡0.7255.72.5%=0.725

=0.77…0.72550.7572.5%

մӴС˳ǣ

>0.75>0.7255>72.5%ڵλ0.7255ʴΪ0.7255.

15.𰸡125000.ÿһƽΪx33x+33x+33x=1+2+3+…+99

99x=(1+99)×99÷299x=99×50x=50.ƽ֮Ϊ503=125000.

16.𰸡113.04.̳İ뾶Ϊ50.24÷3.14÷2=8()3.14×[(8+2)2-82]=3.14×[100-64]

=3.14×36=113.04(ƽ)ʯ·113.04ƽףʴΪ113.04.

ʣµӺޣҪ12.

18.𰸡(1)439.6ƽ;(2)612.3.

(1)62.8÷3.14÷2=10()

3.14×10²+62.8×2

=314+125.6

=439.6(ƽ)

Ĩˮ439.6ƽ.

(2)3.14×10²×(2-0.5)

=314×1.95

=612.3()

ʱˮ612.3.

19.𰸡34Ԫ6Ԫ.

һ40×6.00%=2.4(Ԫ)

(2.4-2.376)÷(6.00%-5.60%)=6(Ԫ)

40-6=34(Ԫ).

40×5.60%=2.24(Ԫ)

(2.376-2.24)÷(6.00%-5.60%)=34(Ԫ)

40-34=6(Ԫ).

ҹִ34Ԫִ6Ԫ.

20.𰸡(1)6000;(2)10800;(3)684000.

(1)5000×(1+20%)=6000(Ԫ)

ڷӵۼÿƽ6000Ԫ.

(2)120×6000×1.5%=10800(Ԫ)

𣺰ּ,Ӧ˰10800Ԫ.

(3)6000×95%×120=684000(Ԫ)

ʵʹ684000Ԫ.

йʦ

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