2021-2022学年河北省唐山市古冶区七年级（上）第一次月考数学试卷（附答案详解）

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2021-2022
ᓅḕᖆ
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ᩭ0VWNXYBᢄ[0ᦈᦔ^℉.`abcᨵ65000000fῃ[0h65000000ᵨjFᦪk⊤m0HnḄ"A.0.65x108B.6.5x107C.6.5x108D.65x1065.rᑡᔜuHnḄ"A.22=-22B.33=—3yC.-22=~22D.-33=|33|6.ᵨ-z{ᐭkᢥ⌕30.05019ᑖT40ᐸ┯Ḅ"A.0.1Ynᑮ0.1B.0.05YnᑮᓟᑖC.0஺5YnᑮᑖD.0.0502Ynᑮ0.00017.XḄ!ᦪ"3,|y|=5,ᑣ+yḄ4GA.—8B.2C.8ᡈ—2D.-8ᡈ28.ᢥ᯿᝞:ᡠmḄ0ᐭxḄ4G-2,ᑣḄ4GᐭX——►3---►-7---►A.8B.6C.—6D.—89.b(-1)202஺X1202156A.-1B.1C.—4D.410.|x-1|+|y+2|+|z—3|=0,ᑣ(%+l)(y-2)(z-3)Ḅ4"()A.48B.-48C.0D.xyz

111.ᓄ¡rᑡᑖᦪ:WT=বM_12.¦u(—20)+(+3)-(—5)-(+7)ᑏᡂḕᶍª«¬«Ḅ®u¯.13.36ᨵᳮᦪm6²³´µ¶0·²^ਮb=a2-ab,ᑣ(-3)=.14.¼½|஺+1|+¾4)2=0,ᑣ£?Ḅ4".15.ᙠ-3,-2,-1,4,5Â.ᦪ0hÂ.ᦪÃ0ᡠÄᑮḄᨬᜧÃÆ".16.ÇÈr☢ᑡᦪ0᪷`·ËᑏÌÍḄᦪ¯-ÎÎ--ÎÎ……Î2021.ᦪ".17.b¯প47+ᯅsÒ3x(-36)Î4(2)-22-[(-3)X(--)-(-2)3].18.hrᑡᔜᦪÓᙠÔḄᜧª«Õ+5,0.23,-—|-4|,0,(-2)2HᦪÖᔠ¯{};᦮ᦪÖᔠ¯{}:KᑖᦪÖᔠ¯{}.19.পᙠᦪ)⊤mrᑡᔜᦪ¯3,-20+00,Ü2.(2)᝞:ᡠm0ᢣ/AஹBஹCஹEஹFᡠ⊤mḄᦪ.-5-4-3-2-10I234520.ßàHKᦪ0áââãäåàæâ6çèḄéê0ëᐰíèîᙳéêðà3ñòó0ᑡàr☢Ḅ⊤ô0GæâèḄ.õö÷ø.ùúûᡂü⍝⚪¯!ABCDEF(ᓫ$%cm)157163——173165+ᐰ-.ᙳḄ01-6—+2-3——(1)¦⊤ôḄÿ
ᑖḄᦪ(2)6ᨬᨬcm?ᑡ.(3)᝞56ᑮᡈ9:.ᙳ;<6᪗>?6@AḄ6᪗᳛CD(E5ᑏᡂa%ḄJ>ᐸaLᶇᑮNᦪOPQ$).

221.STUᑡV%᝞=1-D=&=1♦“•XYZ@V[\ᑖ]^_`%aஹ+=1—c+cߟ:+—=1—7=7,পghiᑏj%k=Q•(2)mnᑏjUᑡᔜḄE5:জ++q+r+'"+20l6^20T7=-----------ঝ_2_+_2_+4—τ——^1x22x33x471X(71+1)(3)sti:2x4+4x6+6x8+…42014x2016,

3uᫀwx᪆1.ூuᫀ௃Bூx᪆௃x%-5Ḅ^|ᦪ}~ᦑ⌱%B.᪷^|ᦪḄx.⚪ὃ^|ᦪ.x⚪Ḅᐵ}^|ᦪḄ>⌕^|ᦪ%஻Ḅ^|ᦪD-a.2.ூuᫀ௃Aூx᪆௃x%••1V2Ḅᦪ}-2w2,1V2ḄO}O4ᦑ⌱%A.᪷1Ḅw>ᑨj1V2Ḅᦪ}-2w2,ᑨj1V2ḄO}@ᓽ.⚪⌕ὃ1Ḅw>⌕>xu⚪Ḅᐵ⌕¡%জ¢D^|ᦪḄ[@ᦪ1^Vঝ1VQ@ᦪḄᦪᨵ[@>1V0ḄᦪᨵQ@>¥ᨵ1V¦ᦪḄᦪ.ঞᨵᳮᦪḄ1©}ª¦ᦪ.3.ூuᫀ௃Cூx᪆௃x%v|+2.5|=2.5,|-3.6|=3.6,|-0.8|=0.8,|+0.9|=0.9,«0.8ᨬN>¬—0.8ᨬn᪗®>ᦑ⌱%C.⚪⌕ὃᦪ+¦ᦪ>᪷ᦪ+¦ᦪ⊤°ḄEᔠ1²N²n᪗®ᑨx.⚪⌕ὃᦪ+¦ᦪ>ᳮxᦪ+¦ᦪḄ}x⚪Ḅᐵ.4.ூuᫀ௃Bூx᪆௃x%65000000=6.5x107.ᦑ⌱%B.³´ᦪḄ⊤°JDaxICT1ḄJ>ᐸlw|a|<10,஻D᦮ᦪ.“Ḅ1;>⌕·¸¹ᦪºᡂ஺;>NᦪO¼½$>”Ḅ1+NᦪO¼½Ḅ$ᦪ^A.¿¹ᦪ1ᜧV10;>▬}ᦪ¿¹ᦪḄ1N1;>஻}¦ᦪ.⚪ὃ³´ᦪḄ⊤°Â.³´ᦪḄ⊤°JDaX10ÃḄJ>ᐸ1<|a|<10,n

4D᦮ᦪ>⊤°;ᐵ⌕஻Ḅ1YÄ஻Ḅ1.5.ூuᫀ௃Aூx᪆௃x%Aஹ22=4,(—2Ç=4,22=(—2È>;Bஹ33=27,(Q3Ê=Q27,27-27,ᦑ⌱⚗┯ÍCஹ-22=-4,(—2)2=4,-4஺4,ᦑ⌱⚗┯Í஺ஹ-33=-27,|33|=27,Q27#27,ᦑ⌱⚗┯Íᦑ⌱%A.᪷ᨵᳮᦪḄÑÂ>ᓽxu.⚪ὃᨵᳮᦪḄÑÂ>xÒ⚪Ḅᐵ}´ᨵᳮᦪḄÑÂ.6.ூuᫀ௃Bூx᪆௃ூᑖ᪆௃⚪ὃ᪷ÓÔÕÖᦪ>ÓÔY}“ᓝᑖ$(0.1)ஹÙᑖ$(0.01)ஹᓟᑖ$(0.001)V,ᢥÜÝÞᐭÕÖᦪ>à·ÓÔḄPQ$ᦪ.AஹÓᑮ0.1á}LᶇNᦪOPQ$>âDNᦪOPã¬$}5,äQ`0.1BஹÓᑮᓟᑖ$>á}LᶇNᦪOPZ$>âDNᦪOPãÜ$}1,Ý>`0.050CஹÓᑮÙᑖ$>á}LᶇNᦪOP[$>âDNᦪOPãZ$}0,Ý>`0.05஺ஹÓᑮ0.0001,á}LᶇNᦪOPÜ$>âDNᦪOPãÞ$}9,äQ>`0.0502ூxu௃x%Aஹ0.0501920.1(Óᑮ0.1),ᡠY⌱⚗Bஹ0.05019ç0.050(Óᑮᓟᑖ$)>ᡠY⌱⚗┯ÍCஹ0.05019=0.05(ÓᑮÙᑖ$)>ᡠY⌱⚗஺ஹ0.05019è0.0502(ÓéiJO.OOOl),ᡠY⌱⚗ᦑ⌱8.7.ூuᫀ௃Dூx᪆௃x%xḄ^|ᦪ}3,ᑣñ=Q3,|y|=5>y=±5,x+y=—3+5=2,ᡈô+y=—3—5——8.ᑣx+yḄ1DQ8ᡈ2.ᦑ⌱%D.✌ᐜ᪷^|ᦪ>1Ḅᭆøᑖ]jxஹyḄ1>ᯠPúᐭx+y,ᓽ`jE5.⚪⌕ὃ^|ᦪஹ1Ḅ.

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ᦪḄᦪḄᦪḄḄᦪ0Ḅ0.8.ூᫀ௃Aூ᪆௃!=-2%ᐭ'-2+3-(—7)=-2+3+7=8.ᦑ⌱A.x=-2%ᐭ12᪾4567ᓽ9'ᑮ;<.=⚪ὃ@AᨵᳮᦪḄDᔠF7GHIJF7Kᑣ⚪ḄᐵN.9.ூᫀ௃Bூ᪆௃(1)2°2஺X/஺21=1x1=1,ᦑ⌱B.᪷WᨵᳮᦪḄXYᓽ9.=⚪ὃ@ᨵᳮᦪḄXYᐵN᪷WᦪḄZ[\]^ᦪᦪḄ᜻\]ᦪᦪḄᏔ\aᦪ.10.ூᫀ௃Cூ᪆௃•••c1|+|y+2|+|z—3|=0,••x=1,y=—2,z=3,(%+l)(y-2)(z-3)=2x(-4)x0=0.ᦑ⌱C.jkᑭᵨḄឋo'pX,y,ZḄrs'pᫀ.=⚪t⌕ὃ@Av'pX,ZḄ⚪ᐵN.11.ூᫀ௃3*0ூ᪆௃(1)]=3O3ᦑᫀz—m6-1(2)|=ᱛ

6ᦑᫀzব3=஺ᦑᫀz0.(1)ᑭᵨᑖᦪḄaឋoᑖᦪḄKᑣF7ᓽ9(2)ᑭᵨᑖᦪḄaឋoᑖᦪḄKᑣF7ᓽ9(3)ᑭᵨᨵᳮᦪḄ◀KKᑣᓽ9.⚪t⌕ὃ@AᨵᳮᦪḄ◀KKᑣvᑭᵨᑖᦪḄaឋoᨵᳮᦪḄ◀KKᑣF7⚪ḄᐵN.12.ூᫀ௃20+3+5-7ூ᪆௃ூᑖ᪆௃⚪ὃ@ᨵᳮᦪḄDᔠF7᪷WḄᑣF7Ḅᓄrᑏᓽ9.ூ௃7(-20)+(+3)-(-5)-(+7)ᑏᡂḕᶍḄ-20+3+5-7.13.ூᫀ௃10ூ᪆௃ூᑖ᪆௃=⚪ὃ@AᨵᳮᦪḄDᔠF7⚪5Ḅ⚪ḄᐵN.ᑭᵨ⚪5Ḅ67ᓽ9'ᑮ;<.ூ௃᪷W⚪5Ḅ'=22—2x(-3)=4+6=10,ᦑᫀz10.14.ூᫀ௃1ூ᪆௃•••|a+1|>0,(b-4)2>0,¡¢|a+1|+(b-4)2=0,£!]a=-l,b=4.ab=(-1)4=1.ᦑᫀz1.᪷WḄ¥ឋஹᏔ\YḄ¥ឋ§=⚪.⚪t⌕ὃ@ஹᏔ\YGHIJḄ¥ឋஹᏔ\YḄ¥ឋ§⚪ḄᐵN.

715.ூᫀ௃30ூ᪆௃ᨬᜧXª(-3)x(-2)x5=3x2x5=30.ᦑᫀz30.᪷Wᦪᜧ«ᑗᦪ'®'¯pXªᦪᨬᜧḄ°ᦪXᓽ9.⚪ὃ@AᨵᳮᦪḄXK±ᨵᳮᦪḄᜧ²³´³´µᓫG·F7Kᑣ⚪ḄᐵN.16.ூᫀ௃-¸ூ᪆௃•,ᑡᦪz"J;—:;…,•¿Àᦪz4¿Áᦪz¿஻ᦪz(-1Ã;•¿2021ᦪ—Äᦑᫀz-᪷W⚪Å5ᦪÆḄᱯÈ9±ᑏpÉḄᦪWÊs9±⚪.⚪ὃ@ᦪÆḄᓄË⚪ḄᐵNÌv⚪ÍÎÏ⚪Å5ᦪÆḄᓄᱯÈᑏpÉḄᦪW.17.ூᫀ௃(1)(+Ð|)x(—36)753=@x(-36)+&x(-36)-4x(-36)=-28—30+27=-314(2)—22—[(-3)x(Ô(-2)3]=-4—(4+8)=-4—12=-16.ூ᪆௃(1)᪷WXKᑖÕ67(2)ᐜ7XY×7XKᨬØ7᝞<ᨵ⌕ᐜ
ᑁḄF7.⚪ὃ@AᨵᳮᦪḄDᔠF7ᨵᳮᦪDᔠF7Û2ᐜ7XY×7X◀ᨬØ7ÜF7ÉᢥÊÞᑮßḄÛ2r67᝞<ᨵ⌕ᐜ
ᑁḄF7.rᨵᳮᦪḄDᔠF7àáÍᔜF7ḄFᵨãF7ä1'ᑮµᓄ.

818.ூᫀ௃+5,0.23,(—2/+5,—|-4|>0,(ߟ2)2—ூ᪆௃+5>0,0.23>0,<0,-I-4|=-4<0,(-2)2=4>0,••ᦪᨵ+5,0.23,(—2)2᦮ᦪᨵ+5,—|—4|,0,(ߟ2)2ᑖᦪᨵᨬ1ᦑᫀz+5,0.23,(—2>+5,—|—4|,0,(ߟ2)2-᪷WஹᦪஹXYḄ±ᨵᳮᦪḄᑖË᪗ê§=⚪.⚪t⌕ὃ@ஹᦪஹXYஹᨵᳮᦪḄᑖËGHIJஹᦪஹXYḄ±ᨵᳮᦪḄᑖË᪗ê§⚪ḄᐵN.19.ூᫀ௃:(1)᝞4-3-242-4-3-2-1*6T2345;*01Q0(2)ᵫ49ìÈ4⊤îḄᦪz0ÈB⊤îḄᦪz2.5ÈC⊤îḄᦪz2.5È஺⊤îḄᦪz0.5ÈE⊤îḄᦪz—1ÈÃ⊤îḄᦪz3.ூ᪆௃(1)᪷Wᦪñìòó4ᓽ9(2)᪷Wᦪñìòôᦪᓽ9.⚪ὃ@ᦪñõöFᵨᦪñᐵìò⚪ᐵN.20.ூᫀ௃1651600+10+266.7%ூ᪆௃(1)⊤÷᝞ø:BCDEF1651600+10+2ᦑᫀz0,165,160,+10,+2(2)(+10)-(-6)=16(cm)ᡈ173-157=16(cm),

9ûü6ý5ᨬþþ³ᨬÿ

16cm,(3)᪗Ḅᨵ44+6a66.7%.6
Ḅ᪗᳛66.7%.ᦑᫀ66.7%.(1)᪷⊤Ḅᦪᑮᙳ
157+6=163cm,ᓽᑮ!"ᜐḄᦪ;(2)%&ᨬ
(ᨬ)Ḅ
*&+,ᓽ-(3)ᐜ᪷⊤/0᪗Ḅᦪ41ᑡ&3453ᓽᑮ67.9⚪ὃ<=ᨵᳮᦪ?ᔠA3ḄBᵨDE⚪FGHI⚪ḄᐵK.21.ூᫀ௃প:᧡ফᗞ-*V1_11_1বn(n+2)-2n+2)]4=2^_`+“-_`+…Xc_d)111=2(2-2016)_1007=4032'ூH᪆௃H:পᵫ⚪FklH-ᐰ1(2)জ]4=++o+…+(d-c)1=1----------2017_2016=2017,1111111ঝ]4=(i_*+G_§)+G_N+…+4—s)1ti_n~n+1'1_11___1_বn(n+2)-2(7iwᓝ2)]4=3^_+…yᗩ_d)_111=2(2-2016)_1007=4032-ᦑᫀপ;}-(2)ᗞ-~Tবᗞ.

10᪷⚪&Ḅᓽᓄ*-I⚪ὃ<ᦪFᑭᵨ⚪ᡠḄ.