I evavanyiweyo Ixabiso - yintoni kwaye ukuba ibalwe njani?

Xa inkqubo yokufunda abafundi imathematika wayeqhelene ingqikelelo arithmetic ukuthini. Kamva kwi-manani kunye nabanye abafundi inzululwazi nazo enye ngokubalwa of avareji. Njengoko babe, yaye zahluke enye kwenye?

Amaxabiso Umyinge: intsingiselo neeyantlukwano

Oku akusoloko izikhombisi echanileyo zinika ukuqonda le meko. Ukuze kuhlolwe imeko ethile, oko kuyimfuneko ngamanye amaxesha ukuhlalutya isixa esikhulu lwamanani. Kwaye ngoko ukuba kunomyinge uncedo. Abavumela ukuba ukuhlola imeko ngokubanzi.

Esikolweni, abadala abaninzi khumbula ubukho kwemin arithmetic. Yinto elula kakhulu ukubala - udibaniso ukulandelelana lwemiba n wahlulwe yi n. Oko kukuthi, ukuba oko kuyimfuneko ukubala imin lokubala eliguqukayo ngolandelelwano lwamaxabiso 27, 22, 34 no-37, kuyimfuneko ukuba isigqibo ibinzana (27 + 22 + 34 + 37) / 4, ekubeni iinqobo-4 ezisetyenziswa izibalo. Kulo mzekelo, ixabiso ekujoliswe ilingana ku-30.

Amaninzi kunyaka wesikolo kwaye bafunde imin yemigca. Ukuze kubalwe le xabiso isekelwe phezu nezokukhupha n-zehydrochloric ingcambu ye imveliso n-amalungu. Xa sithatha amanani ezifanayo: 27, 22, 34 no-37, isiphumo ubalo ilingana 29.4.

Imin harmonic kwisikolo samabanga aphakamileyo Kudla ngokungabikho isifundo zokufunda. Noko ke, ukuba isetyenziswa kakhulu rhoqo. Eli xabiso uguqulo lonikezelo lwe izibalo kuthetha kwaye ibalwa njengoko QUOTIENT of n - Inani lamaxabiso _{nesambuku-1/1} + _1/2 + ... + 1 / a _n. Ukuba usafuna uthabathe enye iseti yamanani kuba ukubala, isiqulatho harmonic ka-29.6.

avareji zokulinganisa: iimpawu

Nangona kunjalo, zonke ezi ubungakanani ayinakusetyenziswa yonke. Ngokomzekelo, kwezinye amanani kubalo amaxabiso angumndilili indima ebalulekileyo "ubunzima" yenani ngalinye kusetyenziswa izibalo. Iziphumo abonakalisa ngakumbi nolunyanisekileyo njengoko kuvumela ulwazi olungaphezulu. Eli qela eziguquguqukayo ligama jikelele "avareji zokulinganisa". Abayi esikolweni, ngoko ke yokuba ukhangele iinkcukacha ezithe vetshe.

Okokuqala, kufuneka kukuxelela into intsingiselo "ubunzima" ye lixabiso elithile. Indlela elula ukucacisa ukuba lo ngumzekelo eziphathekayo. Kabini ngosuku esibhedlele kukho ubushushu bomzimba ulinganiswa isigulane ngasinye. Of izigulane 100 kumasebe esibhedlele ezahlukeneyo 44 uya kuba kubushushu obuqhelekileyo - 36.6 degrees. Kwenye 30 ziya kwandiswa ixabiso - 37.2, 14 - 38, 7 - 38.5, ukususela nge-3 - 39, kwaye eseleyo ezimbini - 40 Kwaye ukuba uthatha izibalo kuthetha, eli xabiso yi ngokubanzi esibhedlele kuya kuba ngaphezulu kwe-38 degrees! Kodwa phantse isiqingatha izigulane ngokupheleleyo lobushushu eqhelekileyo. Yaye nantsi ichanekile kakhulu ukuba ukusebenzisa i-avareji ixabiso marks, yaye "ubunzima" variable ngamnye inani labantu. Kulo mzekelo, ngesiphumo yokubala iza kuba degrees 37,25. Umahluko izicacele.

Kwimeko izibalo bemfuno avareji "ubunzima" isenokuba inani okuzo kwenziwa, inani labasebenzi yosuku oluthile, abantu, ngokubanzi, nantoni lungabaleka kwaye ukuphembelela eziphumo zokuphela konyaka.

uhlobo

I-avareji Ixabiso lobungakanani bemfuno ke ngamazinga kunye imin arithmetic, ngazo ekuqaleni kweli nqaku. Nangona kunjalo, ixabiso lokuqala, njengokuba kuthiwe, sikwaqwalasela ubunzima yenani ngalinye asetyenziswe izibalo. Ukongeza kukho kwakhona amaxabiso bemfuno zejometri harmonic.

Kukho nenye ezahlukahlukeneyo umdla ezisetyenziswa imingcelele amanani. Kukho malunga ne-weighted iavareji. Ukuba ntsingiselo zibalwa ngokusekelwe kwayo. Ukongeza iinqobo ngokwabo kwaye ubunzima zabo kananjalo wasebenzisa rhoqo. Kwaye ekubaleni ixabiso avareji kwinqanaba elithile ixesha Kwakhona kuthathelwa ingqalelo inani lo kumathuba kwixesha elidlulileyo.

Ukubalwa ezi lamaxabiso nto inzima kakhulu, kodwa ke xa kusenziwa Kudla ngokusetyenziswa umlinganiselo kuphela eqhelekileyo weighted.

Le ndlela yokubala

Xa yobudala computerization lakwaZulu akuyomfuneko ukubala i-avareji zokulinganisa ngesandla. Nangona kunjalo, kubalulekile ukwazi ukuba Ngokwefomyula yokubala ukuba kwakunokwenzeka ukuba lokukhangela ulungise iziphumo njengoko kuyimfuneko.

Indlela elula ibiya kuba ukuqwalasela ekubalweni umzekelo ethile.

Kuyimfuneko ukufumanisa ukuba yintoni na umvuzo avareji kwi isityalo ngokumalunga nenani labasebenzi abafumana ingeniso kwezinye.

Ngenxa yoko, i-avareji ubalo lobungakanani bemfuno lwenziwe kusetyenziswa le formula:

x = ₍₁ * w ₁ + ₂ * w _{2 + ... + n a * w n} ) / (w ₁ + w ₂ + ... + w _n)

Umzekelo, ukubala ubuya kuba:

x = (32 * 20 + 33 + 35 + 34 + 14 + 40 + 6) / (20 + 35 + 14 + 6) = (640 + 1155 + 476 + 240) / 75 = 33.48

Ngokucacileyo, kukho ubunzima kakhulu ukwenzela ukuba kubalwe ngesandla i-avareji zokulinganisa. Ifomula yokubala eli xabiso kwelinye izicelo ithandwayo fomyula - Excel - ikhangeleka ngathi umsebenzi SUMPRODUCT (uthotho amanani, iseti zemilinganiselo) / SUM (inani esikalini).