2016-2017学年浙江省杭州市上城区英特外国语学校七年??期末数学试卷与参考答?- 百度文库

2016-2017ѧ㽭ʡϳӢѧУ

꼶ϣĩѧԾ

ο

һѡ

13֣3෴ǣ A3

B3 C D

𡿽⣺3෴3 ѡA

23֣ʾG2022.4ڣG20һռΪ69%С22.4ڡÿѧʾΪ A22.4109

B2.241010 C2.24109 D0.224109

𡿽⣺22.4=22 4000 0000=2.24109 ѡC

33֣йڵʽAϵ32 Cϵǣ3

˵Уȷǣ

Bϵǩ3 Dϵ2

𡿽⣺ߵʽǩĸָĺ1+2=3

˵ʽϵǩ3

5ҳ16ҳ

ʴΪ3 ѡB

43֣õʽʣβȷǣ Ax=yx+5=y+5 C=a=b

Ba=bac=bc Dx=y=

𡿽⣺Ax=yx+5=y+5ȷ⣻ Ba=bac=bcȷ⣻ C=a=bȷ⣻

Dx=y=a0ʴѡ󣬷⣮ ѡD

53֣1a0aa2С˳Ϊ A

B

C

D

𡿽⣺ߩ1a0 a==2a2= ߩ2 ࣼaa2 ѡB

63֣ͼжEBACǣ

AC=ABE

BA=EBD CC=ABC DA=ABE

6ҳ16ҳ

𡿽⣺AC=ABEжϳEBACAѡ⣻ BA=EBDжϳEBACBѡ⣻

CC=ABCֻжϳAB=ACжϳEBACCѡ⣻ DA=ABEڴȣֱƽУԵóEBACDѡ⣮ ѡD

73֣ⷽ

=1ȥĸȷǣ

B3x122x+3=6 D3x14x+3=6

A3x122+3x=1 C3x14x+3=1

𡿽⣺ȥĸã3x122x+3=6 ѡB

83֣ͼʾabʽ|a|+2|b||ab|ĽΪ

Ab

B3b2a C2a+b Db2a

𡿽⣺ã1a01b2 ab0

ԭʽ=a+2b+ab=b ѡA

93֣˵

ֱཻйûйߵǶԶǣ ߶ûн㣬ô߶ֱҲûн㣻 ڲǵƽ߹һֱǣ

ֱһֱϸӵ߶У߶̣ȷ

7ҳ16ҳ

A1

B2 C3 D4

𡿽⣺ֱཻйûйߵǶԶǣԣ ֱӳн㣬

ڲǵƽ߹һֱǣԣ

ֱһֱϸӵ߶У߶̣ԣ ѡC

103֣ij̵۲ͬļ135Ԫһӯ25%һ25%У̵꣨ Aⲻ׬

B׬9Ԫ C׬18Ԫ D18Ԫ

𡿽⣺ӯ25%ļΪxԪã x+25%x=135 x=108

25%ļΪyԪã y25%y=135 y=180

1352108+180=18Ԫ ̵18Ԫ ѡD

113֣81ƽ 9

𡿽⣺ߣ92=81 81ƽǡ9 ʴΪ9

8ҳ16ҳ

ϵͷ779662525#qq.com(#滻Ϊ@) ICP20003344-4