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(C卷）含解析

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15ூᑖ᪆௃᪷FUVḄᑁ⚗_᜜⚗aᡂUV᪷FUVḄWXឋJ0UVᓽ஺ூ=0௃x410.2=548.58.5x=10.2x58.5x+8.5=10.2x5+8.5x=625.x=32ூᑖ᪆௃ᵫ⚪dᑡUV344=244x,᪷FUVḄWXឋJ0UVᓽ஺ூ=0௃344=244X3x=4x243x+3=4x24+3x=3226.90.432fKgூᑖ᪆௃hZᙊj.klḄm☢o_p☢oqPrstuẈḄ☢o஺ூ=0௃3.14x(8+2)2+3.14x8x1.6=3.14x42+25.12x1.6=3.14x16+40.192=50.24+40.192=90.432(fKg)4\tuẈḄ☢os90.432fKg஺X⚪ὃ*ᙊj⊤☢oxHḄyᵨᐵ{s|}tuộḄ☢osm☢o1p☢oḄ_஺4ᫀ10⚓ᐳ13⚓

1627.ூᑖ᪆௃᪷FᙊjḄoxH\o=p☢oxᐭᦪFhZḄo_Z᝘ḄoUᜧᜧZ᝘ḄorrF%04஺ூ=0௃kḄo:3.14x(8+2)2x10=3.14x16x10=50.24x10=502.4(cm3)502.4cm3=502.4mL502.4>498,ZZ᝘஺4\ZZ᝘஺ᙊjḄoxHs04X⚪Ḅᐵ{dᓫᦪḄᣚ஺28.11304Kg@226.08ᔴூᑖ᪆௃᪷FᙊḄᕜxHr=C+2ᐔh¡ᚮḄ£ᑭᵨV=3Shhᙊ┵.¡ᚮḄ¦o,[6rs6ᚮN᪵ᜧḄᙊ┵.¡ᚮḄ¦oᵨ¡ᚮḄ¦o[2rsZ©¡Ḅª«F%04ᓽ஺ூ=0௃18.84-3.14-2=3(g)3x(3.14X32x2)x6]_=3X56.52X6=18.84x6=113.04(Kg)113.04x2=226.08®ᔴ¯4ᫀ11⚓ᐳ13⚓

174\Z©¡ᐳᨵ113.04KgZ©¡ᨵ±226.08ᔴ஺%⚪ὃ*²ᙊḄ☢oxH_ᙊ┵Ḅ¦oxHᙠ³▭µ⚪¶Ḅ·ᔠyᵨ஺29.100.48fKgூᑖ᪆௃᪷F⚪dhᙊj.kltuẈrshZᙊj.klm☢Ḅ☢o1p☢Ḅ☢o_᪷FᙊjḄ⊤☢oxH\m☢o+p☢oᐭᦪFᓽ04஺ூ=0௃3.14x8-2
2+3.14x8x2=3.14x16+25.12x2=50.24+50.24=100.48®fKg¯4\tuẈºᑖḄ☢os100.48fKg஺᪷FᙊjḄ⊤☢oxH»¼04@ds½¾kl¿ᣵp☢Ḅ☢o஺30.\5ᔖg@Â\3ᔖg-Ã=0ூᑖ᪆௃᪷F\-QÄÅ=³▭ÄÅxUVÆ@ᐭᦪFhK.ÇÈlḄ-QḄஹÂḄÄÅ,ÊḄf☢-஺ூ=0௃100g=10000ᔖg;60g=6000ᔖg]10000X2000=5®ᔖg¯16000x2000=3®ᔖg¯s5ᔖgÂs3ᔖgḄK.஺4ᫀ12⚓ᐳ13⚓

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