北师大版2022-2023学年辽宁省沈阳市数学七年级秋季开学摸底考试（三）含解析

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ᓣ௃ᓅᜧ᱐2022-2023ḕ□ᦪ᥎ὃ⚪!ᑖ28ᑖ1.ᙢᳫ()□*+Ḅ-./0149450000ᓟ6789ᦪ:;<=ᵨ?@AᐭCḕᶍ''F"H☢ḄJᦪ7/0F.2.2.25L=Lᑖ5NO650NOᑖ6=NO6500PO6=Q⚕5230Tᓣ=ᓣ3.ᮣVWᜩḄYZ0-8°C_6࠷,WᜩᨬdZe0___,ᨬgZe(ᨬdZehi____.4.3:0.125Ḅkl0ᓄᡂᨬo᦮ᦪk0.85.q᪷ᩈᧇᵨu40%H7wᒕ1.5678᪷ᩈᧇy6.146.—஻=—6ᑣ஻<6=:.457.q9ᙊḄg05ᑖ67☢ᒈ9OḄᒈ☢789ᙊḄ☢ᕜy0__ᑖ6.8.ᙠᑖᦪᓫ0,Ḅᑖᦪ7ᡠᨵᑖᦪḄ0.159.᪥ᨵ40007ᩭa7ᙠqᐳᨵ___.10.2014ᦪ⚪஻ᙢḄ´▭h-0____km.12.ᨵᵬஹ·ஹ¸¹ᖪ»7᝞½ᵬ3¾ஹ·7¾ஹ¸1¾7ᐳ◤32ᐗ=ᵬ4¾7·10¾7¸1¾7ᐳ◤43ᐗ7ÁÂᵬஹ·ஹ¸ᔜq¾◤ᐗ.13.ᨵ9ÄÅᏔᦪ7+q90a,(ÇhÈḄ9ᏔᦪᑖÉ0.14.᝞0ᵫ9OËÌᡂḄ.Í1⚓/Ð14⚓

1Ñ.⌱Ó⚪!ᑖ5ᑖ15.q¯ᙢ7yÔᑮÕÖḄ°-.05ᔖ6஺⊤Ú´▭-.15ᓟ678¯ᙢḄk¬0A.1:3B.1:3000C.1:30000016.ÝᳫkÞL7ßÝᳫàᙢHáâḄgeᨵãäḄåæ7ᢥ⌕è7ÝᳫᐙêYH7ëágeìígîïgeḄðñídîïgeḄ2஺ᨵqòÝᳫó18஻ḄgeàH7áâḄgeô93õ±ö1.25"?,8òÝᳫᵨîkÞ஺A.øB.íøC.íùúæ0ᔲø17.©q9ᙊüᡂq9ᨬᜧḄᙊ┵7üuþᑖḄ˨089ᙊ˨ḄA.-B.-C.2ÿ3318.9ஹ12ஹ15᦮◀ḄᨬᦪA.3B.90C.18019.᪥ᓝᨴᵨᵯ!"#ᨴ$20%,#ᨴ'ᓝᨴᵨᵯ!Ḅ"A.5:4B.5:6C.6:5D.4:5,.ᑨ.⚪0ᑖ8ᑖ20.ᙠ"34567ᑁ⚗:;᎔ᦪ5ᑣ7᜜⚗?@:;᎔ᦪ.21.ᦪ◀AᎷᑖᦪ5ᡠDḄᖪ"Fᦪ஺—22.ᚮ᯼ḄK!LM5NOḄ᯼'ᒕQḄ᯼ᡂS"3..23.Tᑖᦪ5ᑖUᑖVWXYZY[L;0,ᡠDḄ\ᑖᦪ@"Fᦪᜧ24.ᙊ_Ḅ`aLM5b☢de᡽ᜧ2g5ᙊ_Ḅhi?᡽ᜧ2g.25.,jklm7nḄoL@ᜧpq,n..26.ᙊ_hiᙊ┵Ḅ3g.q2⚓/K14⚓

227.ᙊ_Ḅhi"'vwbw`Ḅᙊ┵Ḅhiᜧ..x.yz⚪(0ᑖ24ᑖ)28.}~ᑏDᦪ.1.45x0.2=0.88+0.44=2-1.2=12.5x0.8=1-0.2-5-0.2=0x6.3-4-9=42+7x7=45x2+4.5x2=29.᪵᪵z168-52-48125x881300+25+4688-534+1128x(29x/25)156x107-156.30.ᡈ"3.(1)—=—183.6(2)4.8%+5.9=34.7..⚪(0ᑖ35ᑖ)31.ᢥ⌕(1)k4ᔣ55Dᑮk8(2)k4஺ᢥ¡X┐ᔣ£¤90஺5DᑮkC(3)k4ᢥ2:1᡽ᜧ5Dᑮk஺32.¥¦3ᨴ5§᱅᱅©5000ᐗ«¬ᐭ®¯5¬°,¦5¦ᑭ᳛;4.25%.ᑮ°³§᱅᱅ᐳµ¶·$«¸33.¹ºO¦Zd¦~»Ḅ¼½;54¾¿5Qd¦Ḅ3.ÀºO¦ᐰ¦~»Ḅ¼½4ᨵ·$¾¿¸34.ÃᵯÄ[ÅᙠÆÇ4800ᐗ5"FÇÈÉÊ200ᐗ5ÅÇ"FÇÈÉÊËᑖÌ͸q3⚓/K14⚓

335.ᑡÏÐÑᵬÓÔÕÖÓ5×3X¯Ø210ᓟÚ5᯿À᪵yz5ܯ4.5XÝAᑮÞÖÓ5ᵬÖ7Óᐳ·$ᓟÚ¸ᵨ"336.ßàáḄᙊ_kâ᫜5â᫜`3ᑖÚ5b☢ᕜå12.56ᑖÚ.জßÀâ᫜ç$⌕·$ᑖÚḄèé¸Dᦪêᶇ᦮ᦪঝÀâ᫜íâ·$ᓣ¸37.ᚮᙊ┵kïð5b☢ᕜå25.12Ú5`1.5Ú5ñòÚḄïðó2ᔴ5Àᚮðó·$ᔴ¸q4⚓/K14⚓

4ᫀö÷⚪1.149450000øùxᓟ#Ëxᓝ¾149450000=1ù;ᫀùxᓟ#Ëxᓝ¾51.2.(1)2.25X=2X15ᑖ(2)5òÚ50òᑖÚ=5.05òÚ(3)500Ú=0.05û⚕(4)5230ýᓣ=5.23ᓣ.ᫀ2,15,5.05,0.05,5.23.3.6-(-8)=14(°C)ᮣ
ᜩḄ-8°C6C,ᜩᨬ-8°C,ᨬᨬ14°C.ᫀ-8"C,14°C.4.-:0.I25=-4-0.12580,1258=(1x8):(0.125x8)ᫀ5,5:1.5.15+(1-40%),=1.5x-,*5⚓/-14⚓

5=2.5./012᪷ᩈᧇ62.5/.ᫀ2.5.746.89:஻=—6,45ᡠ>a:b=±3=3=16:1515415ᫀ16,15.7.3.14x5=15.7.ᑖ/0D2EᙊGḄH☢ᕜ615.7ᑖ/.ᫀ15.7.8.ᑖᦪᓫMNḄOᑖᦪᨵ-231314151515'17…T?ஹ15ᓃWXYZ["\"123131415x7.ᡠᨵOᑖᦪḄ]:H--H----F...H---1---=-----=7;151515151515ᫀ7.9.bᙠᨵ4000+0.d0.bᙠ:ᐳᨵ.4000+°0d.ᫀ.4000+a0.10.5x3=15.ᔖ/03x3=9.ᔖ/015x9=135.ghᔖ/0iᑮḄklḄ☢m135ghᔖ/.ᫀ135ghᔖ/.11.35ᓟ/=3500000ᔖ/Dᦋᡂᦪqrst1350000014ஹ8uvḄwx2.4a”Dᑣ{ஹ8uvḄ|▭w35x2.4=84.ᓟ/0.ᫀ1:3500000,84.*6⚓/-14⚓

612.~ᵬ:xᐗD:yᐗDᑣ:(32-3x-7y)ᐗDᵬᔜ1ᐳ◤x+y+(32-3x-7y)=32-2x-6yᐗ.4x+10y+(32-3x-7y)=43,ᡠ>x+3y=11,ᡠ>D32-2x-6y=32-2(x+3y)=32-2xll=10.ᵬᔜ1ᐳ◤10ᐗ.ᫀ10.13.EᏔᦪuv2,ᡠ>EᏔᦪDv:E0,ᑣEᦪᑖa—2]a+21ᫀa—2>a+2.14.9..⌱⚪15.15ᓟ/=1500000ᔖ/15ᔖ/1500000ᔖ/=1:3000002ᙢkḄrst1:300000஺ᫀCo716.1.8x-=1.4(/)921.8x-=1.2(/)1.2>1.25<1.42ᳫ>ᵨr஺ᫀAo17.ᡂḄᨬᜧᙊ┵ᩭᙊG¡H¡Dᑣᙊ┵Ḅ¢mᙊGḄ¢mḄ£D3I2ᡠ>¤¥ᑖḄ¢mᙊG¢mḄ1-2=4.33ᫀB.18.9=3x3,*7⚓/-14⚓

712=2x2x3,15=3x5,ᡠ>9ஹ12ஹ15Ḅᨬ¦§¨ᦪ3x3x2x2x5=180.ᫀC.19.ᓝᨴ«Ḅᵨᵯ1-20%=80%1®ᨴ«Ḅᵨᵯᓝᨴ«Ḅᵨᵯ=1:80%=1:0.8=(1x10):(0.8x10)=10:8=(10-2):(8-2)=5:4ᫀA..ᑨ°⚪20.ᙠrs±D²Eᑁ⚗µ9᎔ᦪD·m1,ᑣE᜜⚗\:¹µ9᎔ᦪD·m\1.ᫀ:7.21.(1)ºᎷᑖᦪ¡1¼D½¾2Eᦪ½0,ᡠiḄᖪ]ᦪ¡.(2)ºᎷᑖᦪᜧ1¼Dজº2Eᦪ0¼DᡠiḄᖪ]ᦪ¡.ঝº2Eᦪ½0¼DᡠiḄᖪrᦪ¦.ÂNDi:Eᦪ◀>ᎷᑖᦪDᡠiḄᖪÄrᦪ¦D\Ä]ᦪ¡Dᡠ>⚪ÅƽÇÈ.ᫀx.22.ɤḄ᯼ḄË+ᒕÍḄ᯼ḄË=:ᚮ᯼Ḅ-(:¹)D]:¹,ᡠ>:ᚮ᯼Ḅ-½ÏDɤḄ᯼ᒕÍḄ᯼½ᡂrs1*8⚓/-14⚓

8ᫀX.23.²2EᑖᦪOᑖᦪ3,ᑣᑖÐᑖÑᑖÒN5,iᑮÓ=2,ᡠ>ÔÕr712337ᩭᑖᦪᜧ1:EOᑖᦪDᑖÐᑖÑÖ¼ÒN¦×½90),ᡠiḄØᑖᦪ:¹rᦪᜧDÅÆÇÈ.ᫀ24.891ºr᡽ᜧ2¨¼DV=%(rx2h=hx4ᡠ>¢mÚ᡽ᜧ4¨1ᡈᎷ~H☢ÜÝ1,\1;ᓃ=3.14xl2xl=3.14ºÜÝ᡽ᜧ2¨¼DR=2ᓃ=3.14x22x1=3.14x4ᡠ>¢mÚ᡽ᜧ4¨1ᫀX.25.ÞlßàáḄ]:¹ᜧ*á1ᡠ>N☢ḄÅÆ┯ãḄ.ᫀx.26.ᵫᙊGஹᙊ┵Ḅ¢m§åæᨵH☢m]EçèḄD⚪éᨵê2EÒ>“¡H¡”Dᡠ>½ÄÅ“ᙊGḄ¢mᙊ┵¢mḄ3¨”1ᫀx.27.89¡H¡ḄᙊGḄ¢mᙊ┵Ḅ¢mḄ3¨Dᡠ>ᙊGḄ¢mrì¡H¡Ḅᙊ┵Ḅ¢mᜧḄÅÆÇÈḄ.ᫀ“í.îï⚪28.*9⚓/-14⚓

91.45x0.2=0.290.88+0.44=22-1.2=0.812.5x0.8=101-0.2-0.2=00x63-9=04.24-7x7=4.24.5x24-4.5x2=429.(1)168-52-48,=168-(52+48),=168-100,=681(2)125x88,=125x(8x11),=(125x8)x11,=1000x11,=110001(3)1300+25+4,=1300+(25x4),=1300+100,=131(4)688-534+112,=154+112,=2661(5)8x(29x725),=9x(8x125),=9x1000=90001(6)156xl0/-156,=156x(107-1),=156x100,=15600.*10⚓/-14⚓

1030.:(1)12—1?18x=1.3x3.613x3.6x=18x=0.26(2)4.8x+5.9=34.74.8x4-5.9-5.9=34.7-5.94.8x=28.84.8x4-4.8=28.84-4.8x=6ñ.⚪31.(1)òkl4ᔣôgõ5öDiᑮkl81(2)òkl4÷஺øᢥú¼┐hᔣüý90஺DiᑮklC1(3)òkl/ᢥ2:1᡽ᜧDiᑮkl஺1=5000x0.0425x3=637.5(ᐗ)5000+637.5=5637.5(ᐗ)ᑮþÿ᱅᱅ᐳ5637.5ᐗ.33.54+——3+411⚓/14⚓

11=126()ᐰ!"Ḅ$%ᨵ126.34.200+(200+4800)=200+5000=4%./01/2344%.35.5ᵬ789ᐳxᓟ<.210:3=x:(3+4.5)3x=7.5x210x=525?ᵬ789ᐳ525ᓟ<.36.জ12.56x3+3.14x(12.56+3.14+2)2=37.68+3.14x22=37.68+3.14x4=37.68+12.56=50.24(ABᑖ<)=51(ABᑖ<)DE᫜GH⌕51ABᑖ<ḄJK.ঝ3.14x(12.56+3.14+2)2x3=3.14X22X3=3.14x4x3=12.56x3=37,68(NBᑖ<)O37.68NBᑖ<=37.68ᓣ:E᫜QE37.68ᓣ.12⚓/14⚓

1237.ᓰᙢ☢U3.14xV25.12+3.14+2W2=3.14x4?=50.24VAB

1314⚓/14⚓