人教版2022-2023学年河北省秦皇岛市昌黎县数学升学分班试卷（一）含解析

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14ᨬæᑖᦪ¿ᑖ"ᑖ$[%ᦪḄᦪᡠgé⚪ê┯ì஺ᦑX⚪ὃUIᨬæᑖᦪ%ᦪ¿ᑖ"ᑖ$íᨵ34´Zᦪ஺21.xூᑖ᪆௃îï(5+100)ðîᓰîïḄòᑖ@?ᵨîḄO◀gîïḄO!<100%ᓽ(Ì஺ூ,௃5+(5+100)xlOO%=5-105x100%-0.0476x100%=4.76%ᦑxD⚪Ḅ⚪ᐵ1234ᦪᓰó34ᦪḄòᑖ@?Ḅô஺22.xூᑖ᪆௃0ᜧḄᦪõ½ºᦪ0Ḅᦪõöᦪ0÷|ºᦪø|öᦪCD஺ூ,௃0÷|ºᦪø|öᦪé⚪ùê┯ì஺ᦑXᳮºöᦪḄᭆû⚪Ḅᐵ஺⌕Ï=0>4ᱯüḄᦪ஺23.4ூᑖ᪆௃ᫀF10⚓ᐳ15⚓

15ᵫ⚪=(ᵬᦪஹ5=yᦪஹ7,ᎷþQ"Ḅÿ1,ᵬᦪᦪ᪷ḄᵬᦪḄ஺ூ௃ᎷᵬᦪX=ᦪx5=l,ᑣᵬᦪ5,ᦪ7,ᡠ#ᵬᦪ:ᦪ=5:7஺ᦑ&ᑭᵨ᎔ᦪḄ*+,-ᵬᦪḄ./0⚪2Ḅᐵ4஺24.xூᑖ᪆௃:+;ᣚ=>axb=b*aBCᓽE0஺ூ௃᪷ᑖ᪆EF4x6=6x4HᵨI:+;ᣚ=ᡠ#ᑨK┯M஺N⚪O⌕ὃRSTU:+;ᣚ=FVḄWXᮣZHᵨ஺25.[ூᑖ᪆௃33]᦮_⊤abcᓫe1,fᙳᑖᡂ4ik⊤kᐸmḄ3iᵨn⁐p⁐qᑖ⊤k஺4£33⊤k]1bcᓫe1fᙳᑖᡂ3iᐸmḄ1iᓽp⁐qᑖ஺p⁐qᑖ3a31J.᦮_Ḅtᡠ#4x5=3஺ூ௃3_[14x3=4N⚪ὃRIᑖᦪ:+Ḅ,-+ᑣwxᳮ,-+ᑣ/⚪Ḅᐵ4஺0ᫀ{11⚓ᐳ15⚓

1626.9856f*~B48000ᐗூ௃28ᔖ~=0.28~22ᔖ~=0.22~>▭/x~/y~஺0.281"^=400x=0.28x400x=1120.221y=400y=0.22x400y=88112x88=9856(f*~)(112x2+88x2)xl20=(224+176)xl20=400x120=48000(ᐗ)0>▭ᓰᙢ9856f*~⌼◤⌕48000ᐗ஺27.ᵱTᨵ25᝕Tᨵ23ூᑖ᪆௃3ᵱTᨵXᑣ᝕Tᨵx+8,᪷ᵱTᦪ+᝕Tᦪ=ᦪᑡ*xḄ./ᵱTᦪᦪᵱTᦪ=᝕Tᦪ஺ூ௃>ᵱTᨵx஺3x+(5X+8)=4885X+8—8=48—80ᫀ{12⚓ᐳ15⚓

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