2018小升初考试数学试题及答案解析[共3套]

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12ஹᦪaᜧv0èv1,aஹa2,9©ᑮᜧ᣸ᑡÁÑḄW஺a1Aஹa(ᦪ.6=1+2+3,ា"5ᡠᨵ(ᦪ/0ᡠ<645“78ᦪ”.☢Ḅᦪ5“78ᦪ”Ḅ5A.9B.12C.15D.288^>BCḄᦪmnp,DEm+n=p,ᑣmnpḄᨬH5A.15B.30C.6D.20>ஹIJ஺ᐳ20ᑖ1ஹNOᑏQRᦪ஺5ᑖ0.22=1800-799=54-20%=2.5X0.7X0.4=-X54-1X5=882ஹῃTIJUVJḄ⌕VJ஺9ᑖ54-2-1+4-8-7ᵴ

23ஹYZ[ᦪx஺6ᑖ3?4x+3X0.7=6.5-:x=3:-43;ஹ\]^_`13ᑖ1ஹaḄbcdAefg┐ij90°kQijlḄ஺BeijlḄmnᵨᦪp⊤r56543210123456789102ஹs☢tuvswxyᶇ᦮ᔖ}7ᡂ☢ᔜ⚪஺1
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3ºஹ»¼½⚪35ᑖ1ஹ᪥ᔠᖛ¿0ÀÁ¿ᐳᨵ48Âᔠᖛ¿Âᦪ5ÀÁ¿Ḅ°஺ÀÁ¿ᨵ±Ã²ᵨcÄ»7Å5ᑖ2ஹᐝÇ\Èsᨵᚮᙊ┵ḄÌÍuRÎ☢ᕜb512.56}Ï1.5}஺ÐÑᜓ¦3ᚮÌÍÓᑮb4}ஹ2}ஹÔ0.7}ḄbcÕÍᙷ×஺3ᚮÌÍUᔲ¦ÍᙷÓD²5ᑖ3ஹᵬÚÛÜ/ḄÏÝÞßsàáḼ☢ãäå஺æäåḄçᙳÝé^á7ᐰÄᡠ◤Ḅg᝞⊤஺åäᜧìåíåîåᜧíåçᙳÝéᓟ}/g907510060gg83.22.4431᝞ᵨV⊤råäḄçᙳÝéT⊤rá7ᐰÄᡠ◤Ḅg஺T^Vᡂñ29ᐵó²¸ᑏQ3ᐵóT஺3ᑖ2£ôᏝöᵬÜ÷åøÏÝÞßùÚÜúûüᙠ3gᑁᑮý஺12þ÷åḄçᙳÝéBUÿ
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4ᑖ2ᐜAF&CḄᦪ"ᯠJK7-2Ḅ@A7⊡ᐙ>᦮஺4ᑖ3,-AFNO"P⌱QRSḄ)*஺5ᑖ5ஹTUVḄWXᵨᵯZ[G\]0.52ᐗ஺06_`(abᵨᵯcd"efTXghijᑖᵯ⊤alᵯZ஺alᵯZmh᪗o᝞qrba(8:00—21:00)l21:0஺R|}8:00\]ᵯZ~ᐗ0.550.35stRSᨴᜧwᵨᵯ120]"ᐸ$aᵨᵯy9lᵨᵯyḄzG3:1஺{,-AFNO"stijᑖᵯ⊤GᔲᔠF5ᑖ

5ᫀrRஹ஺\1ᑖ"ᐳ16ᑖ஺1ஹ(ᓟ)(3470000000)(35)2ஹ(-1)(0.5)ᡈ)553ஹ(-)(8)4ஹ(0.15)(0.25)5ஹ(41)(10)6ஹ(5:3)7ஹ(3.14)a8ஹ(125)(/)ஹ⌱஺\⚪2ᑖ"ᐳ16ᑖ஺1ஹA2ஹD3ஹC4ஹB5ஹD6ஹD7ஹD8ஹBஹAF"ᐳ20ᑖ஺1ஹ\⚪1ᑖ"ᐳ5ᑖ஺ᫀᶍ஺2ஹᐳ9ᑖ"\⚪3ᑖ஺1ஹ3⚪=ᵨ\⚪.1ᑖ஺57--353ஹᐳ6ᑖ஺\⚪3ᑖ஺x=1.1x=—6ஹ஺ᐳ13ᑖ஺1ஹ⚪2ᑖ஺71ᑖ"ᫀᶍr1ᑖ"B¡¢£JḄ¤¥ᵨᦪ¦⊤§G(7,5)02ஹ⚪5ᑖ"\1ᑖ"᪗¨TḄ¤¥1ᑖ஺(ᓭ)(ª)(30)(1:30000)7ᶍ஺3ஹ⚪6ᑖ"72ᑖ"AF☢¬4ᑖ஺313.14x62x-+3.14x(6-4)2x-=87.92()44rᶍஹ`®¯⚪஺ᐳ35ᑖ1ஹ`r°±²³ᨵxµ஺

6-x+x=487x=28rᶍ2ஹ3.14X(12.564-3.144-2)2X1.5X1=6.28(¶)34X2X0.7=5.6(¶)6.28>5,6r·ᚮ¹º»Kºᙷ½஺3ஹ(1)T¾VᡂÀzÁᐵÃ"ᐵÃÄ07V=240(2)`r°ÅÆÇḄᙳÉ]=»Êxᓟ/஺Q3x=90x-3x=80rÅÆÇḄᙳÉ]=»Ê80ᓟ/஺4ஹ(1)2000X(1-35%-20%-20%)=500()rᶍ(2)AFCḄᦪᓰ3ᑖ"⊡ᐙ@A7ᓰ1ᑖ஺2000X20%X98%=392()(3)Ar6304-(2000X35%)X100%=90%B:3704-(2000X20%)X100%=92.5%C:98%D:4704-500X100%=94%98%>94%>92.5%>90%rP⌱C)*஺315ஹ12OX^XO.55+12OX——X0.35=60(ᐗ)3+13+1120X0.52=62.4(ᐗ)60ᐗV62.4ᐗrstijᑖᵯ⊤ᔠF஺

7ᓣÍᦪÎÏ⚪Rஹr~ᐳ21ᑖ\1ᑖ1ஹ70305880Ð,ᦋᑏᡂᵨ“”ᓫ¤ḄᦪG~,ḕᶍ¤J☢ḄÒᦪwG~02ஹ2010Ø16Ù*ÚÛÜÝḄÞßà02010Ø11ᨴ12}——11ᨴ27}"âã·ÙÛÜÝ⌕åᔊ~Sçèé
~ᜩ஺123ஹë2d>1ᓄᡂᨬ᦮ᦪzG~,zîG~஺oJ4ஹ3:=4-24=ï75%=ᢚ஺5ஹ᝞7$ᙊòḄó☢ôõG~"ë·SᙊòḄö☢÷Æøù.ᑮRSû"·SûḄ☢¬G~"·SᙊòüḄü¬G~0~ᙊᕜ᳛0TTv—8cm-►L55x1555+15'77xC77+~ߟ'7ஹ1ᓟÿ
50
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81ஹ2008~Ḅ1ᨴRஹ2ᨴRஹ3ᨴRᐳᨵ)ᜩ஺A.89B.90C.91D.922ஹPᑖᒘᡂ1,110X஺A.ZB.1YḄ_C.ᕜD.☢^5-33ஹa5ᔖb3ᔖb5⊤6ᑖO஺A.%)B.%C.%D.%)4ஹᑖᦪḄᑖL3ᑖ᡽ᜧ3,ᑖᦪIL஺A.3B.6C.9D.G5ஹᑡX_Yᡂ%;ᐵzḄ஺556A.Y=3+XB.X+Y=7C.X=2YD.Y=7OoAPஹ⚪&ᐳ30ᑖ1ஹ¡¢ᑏ¤¥ᦪ஺C⚪1ᑖ226X50=25X0.2=10-0.86=24X4=247+3=85=125%X8=4.8+0.8=2-|xO=12X(4+6)=1-14-9=32.5X3.5X0.4=2ஹῃ§஺C⚪2ᑖ411212xx30.25X5+2.5%9.6-114-7+7X4633ஹ¨%;_a©஺C⚪2ᑖX5.4+2X=8.62.5:5=x>80.2=1N4ஹᑡ§஺C⚪3ᑖ1180%ᦪḄ50%)10,ᦪ)ª

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10-1ஹ=ᓟ?@ᓝBCᓟDEDᓝ7030.588B7031B2ஹ213275ᡈ2ஹ51>401404ஹ41816=C5ஹ4cm80ncm2160cm36ஹ15217ஹ58ஹ099ஹ2510ஹ1:300000G1ஹX2ஹX3ஹJ4ஹX5ஹJ@1ஹC2ஹA3ஹC4ஹC5ஹDH1ஹ130059.141810610785-3.5934B-X32ஹ0.25X-+2.5%9.6-114-7+-X412x57t)_cz1147=0.2+2.5%-9.6——+—=12X[-X3]7767=0.2+0.025=9.6-(ߟ--)=12X1772=0.225=9.6-1=42=8.6X3ஹ5.4+2X=8.62.5:5=x:80.2=1-24xI2X=8.6-5.4I5x=2.5X8I—=1-0.2X2X=3.2X=205B=0.8X=1.6X=4X=0.8X24X=19.2

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X54_271G340----/\—54="ᡈ1.3520C1ஹ80X54-100=4004-100=4UVRSᶍ஺2ஹ96-96X60%96X60%X6=96—57.6=57.6X6=38.4ᐗR=345.6ᐗR345.6<360S:ᶍ஺3ஹ381%=3800ᐗRSᶍ஺4ஹIXY▭ᙳ\ᜩ^(_`Xa஺25-5
X=400020X=4000X=200Sᶍ஺5ஹ
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X2+15=56+15=71ᑖRSᶍ஺6ஹ20/2=10R20X25--X3.14X1022=500-1.57X100=500-157=343RS:ᶍ஺7ஹV*9ᙊ#=3.14X62X0.5=3.14X36X0.5=56.52bᔖRV*9ᙊ#=Vᙊ┵Sᙊ┵☢=56.52■?-X9R3=56.524-3=18.84ᔖRSᶍ஺

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Ḅ᱄Ḅ,ᙠC6ḄEᜐ⍗Ḅᕜ஺14DEC6ஹᵬஹ#ஹ$%&'()*ᵯ,᝞ᵨᵬ/Ḅ01%2ᵯ,ἠ4539ᐗ7᝞8ᵨ#/Ḅ0&1%2ᵯ,ἠ4550ᐗ7᝞8ᵨᵬஹ#ஹ$%9/&Ḅ01%2ᵯ,ἠ,:;26ᐗ<=$/>25ᐗ0?@A)2ᵯ,ἠ;BᐗC

16᪗EFᫀJஹ1ஹ129530000013H2ஹ6|5.083ஹ3,4,12,75,IJ54ஹ->0,83>8.3%5ஹ4>3K6ஹ9,277ஹ5:78ஹ48649ஹ11)ᔴ10ஹ9:711ஹM12ஹ605Nஹ1ஹx2ஹJ3ஹ14ஹx5ஹx6ஹx%ஹ1ஹA2ஹB3ஹA4ஹC5ஹC6ஹB2Oஹ1ஹ0.47100510-1.0399001.6821552ஹ10.441313ஹ83.8860132Jஹ1ஹᕜA2x3.14+2x2=10.28(cm)☢QA2x2x3.14+2=6.28(cm2)Rஹ1ஹ6404-80%-640=160(ᐗ)*72ஹ120x10%=12(⚓)120-12=108(⚓)108x(⚓)12+27+1=40(⚓)493ஹ36x(1--)(1-—)-36=2()919224ஹ10x3.14x10+(104-2)x3.14=392.5(cm)14115ஹ6x24-)=100()25256ஹVWN:VAY)2ᵯ,ἠxᐗ஺(3x-39)+(3x-50)+25—3x=266x-89+25-3x=263x—64=26x=904-3x=30

17VWNA[39+(26-25)+50]-?3=30(ᐗ)