幂的除法运算及科学记数法

relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod1,andtoolmeasurement2,andestimates16,andsubject:geometrypreliminaryknowledge(1)--lineandanglereviewcontentline,andsegment,andRay,andvertical,andparallel,andangleangleofclassification(slightly)17,andsubject:geometrypreliminaryknowledge(2)--planegraphicsreviewcontenttriangle,andedgesshaped,andround,andfanaxisymmetricgraphicsperimeterandareacombinationgraphicsofareasubject:Preliminaryknowledge(3)-reviewofsolidcontentcategory1-dshapesaredividedinto:cylinderandcone2,columnisdividedinto:cuboid,square3,coneconeofthefeaturesofcuboidsandcubesrelationshipbetweencharacteristicsofcircularconeisslightlysolidsurfaceareaandvolume1,size2,table...和和平与发展是当今世界发展的主题，中国作为屹立在世界东方的大国，要担负起重要的责任。从“亚太自由贸易区”到“亚投行”、“一带一路”，再到G20峰会，都体现出中国一个负责任的大国形象。计算：(1)53÷53=____;(2)33÷35===(3)a2÷a5==同底数幂相除，底数不变，指数相减，即am÷an=am-n(a≠0,m、n都是正整数，并且mn)注意：底数a是不等于零的，若a为零，则除数为零，除法就没有什么意义了。2.讨论下列问题:(1)同底数幂相除法则am÷an=am–n(a≠0)中,m,n必须满足什么条件?(2)要使53÷53=53-3也能成立,你认为应当规定50等于多少?更一般地,a0(a≠0)呢?(3)要使33÷35=33-5和a2÷a5=a2-5也成立,应当规定3-2和a-3分别等于什么呢?●任何不等于零的数的零次幂都等于1●任何不等于零的数的-p(p是正整数)次幂,等于这个数的p次幂的倒数.例1、用分数或整数表示下列各负整数指数幂的值.（1）10-3(2)(-0.5)-3(3)(-3)-4（4）例2、下列计算对吗？为什么？错的请改正。①（－7）0=－1②（－1）－1＝1③8－1=－8④a3÷a3=0⑤ap·a－p=1（a≠0）01(0)aa1-pa=(a0,ppa是正整数）2)32(relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod1,andtoolmeasurement2,andestimates16,andsubject:geometrypreliminaryknowledge(1)--lineandanglereviewcontentline,andsegment,andRay,andvertical,andparallel,andangleangleofclassification(slightly)17,andsubject:geometrypreliminaryknowledge(2)--planegraphicsreviewcontenttriangle,andedgesshaped,andround,andfanaxisymmetricgraphicsperimeterandareacombinationgraphicsofareasubject:Preliminaryknowledge(3)-reviewofsolidcontentcategory1-dshapesaredividedinto:cylinderandcone2,columnisdividedinto:cuboid,square3,coneconeofthefeaturesofcuboidsandcubesrelationshipbetweencharacteristicsofcircularconeisslightlysolidsurfaceareaandvolume1,size2,table...和和平与发展是当今世界发展的主题，中国作为屹立在世界东方的大国，要担负起重要的责任。从“亚太自由贸易区”到“亚投行”、“一带一路”，再到G20峰会，都体现出中国一个负责任的大国形象。例3、计算①950×（－5）－1②3.6×10－3③24÷（－10）0④（－3）5÷36幂的混合运算进行同底数幂的除法运算时，应注意运算顺序，即先计算乘方，再算乘除，最后算加减，有括号的，先计算括号里面的。[例1]计算：(1)（a4）m÷am+1÷am-1(2)(a6n÷a2n)÷an(3)[(a4)3·(a4)3]÷(a6)2÷(-a3)2(4)x2·x7+x12÷x8·x6-xm+6÷xm-4说明：1、因为加法满足交换律，所以（a+b）n=(b+a)n2、当n为奇数时，（a-b）n=-(b-a)n，当n为偶数时，（a-b）n=(b-a)n3、当n为整数时，2n+1为奇数，2n+2为偶数计算：(1)（x+y）6÷(x+y)5·(y+x)7(2)(m-n)9÷(n-m)8·(m-n)2relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod1,andtoolmeasurement2,andestimates16,andsubject:geometrypreliminaryknowledge(1)--lineandanglereviewcontentline,andsegment,andRay,andvertical,andparallel,andangleangleofclassification(slightly)17,andsubject:geometrypreliminaryknowledge(2)--planegraphicsreviewcontenttriangle,andedgesshaped,andround,andfanaxis