2023届山西省右玉县数学七年级上册期末综合测试试题含解析

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2022-2023
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8ᑖ^«¬®3জ¯a=4,b=3°AஹBcUzḄ±²A4-3=1ঝ¯a=4,b=-3°AஹBcUzḄ±²A4-(-3)=1ঞ¯a=-2,b=3°AஹBcUzḄ±²A3-(-2)=5ট¯a=-2,b=-3°AஹBcUzḄ±²A(-2)-(-3)=1ᓽAஹBcUz±²ḄᨬᜧLfµ1,ᦑ¶ᫀ^31.ூUV௃w⚪ὃYᦪ¸¹º»Leᐵ¼Q¥¦½ᦪ¸¾A⊤ÀḄᦪAm,B⊤ÀḄᦪAn(m>n),ᦪ¸¾cUAஹBzḄ±²⊤À^|m-n|,ÁNÂ⊤À^m-n(ᜧḄᦪÃÄÅḄᦪ).14ஹ1ᡈ1ூᑖ᪆௃᪷ᦪ¸¾ḄU⊤ÀḄᦪᑖc¬®ᑖÇJKUC⊤ÀḄᦪᓽN.ூOE௃•.•ᦪ¸¾AU⊤À-3,ÈUBᑮUAḄ±²A2,¯UBᙠUAḄaÉ°ᑣUB⊤À-1,•:Bஹ஺cU⊤ÀḄᦪË^eÌᦪ:,UC⊤À1,¯UBᙠUAḄbÉ°ᑣUB⊤À-1,,Bஹ஺cU⊤ÀḄᦪË^eÌᦪ:.C⊤À1,ᦑ¶ᫀA31ᡈ1.ூUV௃w⚪r⌕ὃYᦪ¸¾ḄU⊤ÀḄᦪ᪷ᦪ¸¾ḄUᑖÍÎÏAE⚪Ḅᐵ.15ஹ1ூᑖ᪆௃ÐÑÒÓὃÔ☢ÕÖkBqᑁḄ«ÖᦪØzḄὶÚÛᑮÜÝJE.ூOE௃E3ÞßÐÑÔ☢ÕÖkBq«ÖàáᑁḄᦪâãÜÝ᝞å3a¾Ḅᦪx2=b¾Ḅᦪb¾Ḅᦪ-1=aåḄᦪbåḄᦪ=b¾ḄᦪxaåḄᦪ+a¾Ḅᦪæ¯aåḄᦪ=19°^=19+1=20,஺=20+2=10,0=20x19+10=390,
a+b+c=10+20+390=420.

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¹ᑖN5AE,NZ=25஺9¹¯6Ḅឋ>ஹL¹ᑖ6Ḅឋ>"NAECḄGᦪ.ூ௃,AB//CD,4D¹ᑖNR4E,Z£>=25°,$NBAD=ZADE,ZBAD=ZEAD,:.ZADE=Z.EAD=25°,VZAEC=ZADE+ZEAD,:.NAEC=50஺ᦑOᫀ%50°.ூ)*௃+⚪ὃ01¹¯6Ḅឋ>ஹL¹ᑖ6ḄWº»¼½¾ឋ>d¿À¼⚪Ḅᐵ.17ஹ1ூ᪆௃Áx=2@ᐭ2r-Ä+1=0"ᑮᐵÇÄḄuᐗuÉᓽ.ூ௃%Áx=2@ᐭ2x-Ä+1=0"%4-m+l=0,"%m=lfᦑOᫀ%1.ூ)*௃+⚪ὃ01uᐗuÉḄÀ½¾uᐗuÉḄÊ⚪Ḅᐵ.MஹO⚪Ë+ᜧ⚪ᐳ7Î⚪ᐳ64ᑖ.O2ᑏᦻaÑÒஹÓÒÔᡈÕÖ×Ø.18ஹDC=3cm,AB=10cm.ூᑖ᪆௃᪷67Ḅ9ÙஹCBஹDBḄ"DCḄ᪷67)Ḅឋ>"ADwDCḄᐵÚ᪷679Ùᓽ".ூ௃DC=DB-CB=7-4=3cmÛQ஺ACḄ)AC-2DC=2x3=6c/w
;./lB=AC+CB=6+4=10m

10ூUV௃W⚪ὃYZcUzḄ±²çḄçIUḄឋAE⚪ᐵ.1319ஹ(1)3,4(2)¯t^:°UBèéêçCDḄIUᔠ(2)4ᡈ54ூE᪆௃ë⚪ᑖ᪆3᪷pÀ᧕J8U⊤ÀḄᦪA-3,U஺⊤ÀḄᦪA1.(1)ᵫì¢x°z=±²ᑡKBC(6+2)U24,ᑣ᧕JU2.WNÂJRUAஹOîïðᡠ⊤ÀḄᦪ(2)CஹOḄIUᡠ⊤ÀḄᦪA13,ᑣ¹⚪QR(6+2)t=26,ᑣ᧕JfḄL(2)◤⌕ᑖÍÎϯU8ᙠUCḄaÉbÉc¬®.ë⚪E᪆3E3᝞p•••45=2(ᓫôõ¢)UAᙠᦪ¸¾⊤ÀḄᦪA-10,.•.8U⊤ÀḄᦪA-10+2=-3.ö•.•ç஺=4(ᓫôõ¢)UCᙠᦪ¸¾⊤ÀḄᦪA5,.•.U஺⊤ÀḄᦪA1.(1)᪷⚪QR(6+2)t=\-3-5|=24,ᓽ3U24,ERt=2.ᑣUA⊤ÀḄᦪA6x2-|-10|=3,UI)ᙠᦪ¸¾⊤ÀḄᦪA1-2x2=4.ᦑ¶ᫀ^3ஹ4(2)Cஹ஺ḄIUᡠ⊤ÀḄᦪA13,ᑣ¹⚪QR13(6+2)Z=26,ERU—.413¶3¯f^[°UBèéêçCDḄIUᔠ4(2)¯U8ᙠUCḄaÉ°¹⚪QR3(6+2)ø3=24,ERU2,W°U8ᙠᦪ¸¾ᡠ⊤ÀḄᦪA4¯U3ᙠUCḄbÉ°¹⚪QRᑮ3(6+2)U22,ERU4,W°UBᙠᦪ¸¾ᡠ⊤ÀḄᦪA24-3=5.ù¾ᡠúU5ᙠᦪ¸¾ᡠ⊤ÀḄᦪA4ᡈ5.UV3w⚪ὃYZ[ᐗ[]BCḄûᵨᦪ¸.E⚪ᐵA⌕ýþ⚪ÿḄ
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ᐜ.ᑖ/.012ᑖ⚗ᔠ!"⚗#$ᓄᦪ'1ᓽ).ூ3௃4(1)O.5x-O.7=6.5—1.3x⚗40.5x+1.3x=6.5+0.7ᔠ!"⚗4L8x=7.2

11ᓄÚᦪ14x=4.Üᑖb%18x+3(x—l)=18+2(2x-l)ÜÝÞ%18x+3x—3=18+4x—2ß⚗%18x+3x-4x=18-2+3ᔠdTU⚗%17x=1919ᓄÚᦪ14x=[.ூ)*௃+⚪ὃ0uᐗuÉཾuᐗuÉḄuá×Ø⚪Ḅᐵ.21ஹ(1)-60*(2)1*(3)2x2-2y2,0ூᑖ᪆௃(1)᪷ᨵᳮᦪḄâÊÊᑣ®¯äÖᓽå(2)ᐜÖæÖæ◀ᨬÖâèå(3)ᐜÜÝÞᔠdTU⚗ᓄ᦮B@ᐭᦪéᓽ.ூ௃%(1)êB=25+15-83-17=-604(2)êB=—1+(—2)x(—3)——x9=-1+6-4=1(3)êB=->2+8}u8}+/u)2=2x2-2y2ூ)*௃+⚪ὃ01ᨵᳮᦪḄíᔠNÖ᦮BḄᓄéཾᨵᳮᦪḄNÖÊᑣî᦮BḄâèÊᑣ⚪Ḅᐵ.922ஹ(1)1*(2)16*(3)a2-2ab+h2=(a-h)2i-4ூᑖ᪆௃(D(2)@ᐭᓄéᓽå(3)ᑭᵨ(1)(2)ḄäÖᓽ.ூ௃(l)Ta=3,஺=2,20/7+62=32—2x3x2+22=13—12=1,(«-^)2=(3-2)2=1(2)Va=-3,b=\,a1—2ab+b2=(-3)'—2x(-3)x1+12=10—6=16,(a-b)2=(-3-1)2=16

12(3)ST'a?—2a/?+Z;2=(஺ߟ*Va--,b=,~_2ab+b2=(a—b)2,a20202020101L,3O3Oஹ2(3?9Z஺2_2#/?+/?2=(஺_8)2=(_Z212202020202020(2J4ூ_`௃a⚪ὃcdeᦪfḄᓄghijḄkeᦪfᓄghl2mnSTopq⚪Ḅᐵr.23ஹ12s+8/t25Ixy-x2ூᑖ᪆௃᪷,uvḄwxyḄxyzᑣᐜ⊤}2Ḅhᯠᑭᵨ.01ᔠ!"⚗Ḅz2xy-3x2+1—xy+xᑣᓄgᓽ).ூ3௃:•,“b=ad+3b-2ccd.5Jxy-x22xy-3x2+\-xy+x1=5(-s+X2)4-3(7xy-x2)-2(2xy-3x2+1)=(-5xy+5x2)+(21s-3x2)-(4-6x2+2)=-5xy+5x2+21:t32-4xy+6x2-2=-5xy+2Ixy-4xy+5x2-3x2+6x2-2=12s+8x2-2ூ_`௃a⚪⌕ὃcuvwxy$᦮fḄᓄguvḄwxyḄxyzᑣ.01ᔠ!"⚗Ḅzᑣo⚪Ḅᐵr.