Mitemo: sei kumativi nhamba maviri grade nzvimbo

In masvomhu inonzi rounding oparesheni, izvo zvinoderedza uwandu kutaurwa kusanganisira achishandisa yokutsiva kwavo, kufungisisa zvimwe mitemo. Kana uchifarira mubvunzo sei kuvandudza nhamba maviri grade nzvimbo, inofanira kutanga kubata zvose mitemo huripo pakati rounding. Kune nzira dzakawanda sei kuvandudza kure nhamba:

1. Statistical - rinoshandiswa chakagadziridzwa vagari veguta racho. Achitaura pamusoro nhamba vagari akadana chete anofungidzirwa kukosha uye kwete chaiyo nhamba.
2. Half - rounding hafu kuenda padyo kunyange nhamba.
3. Rounding kune vashomanana (kumativi kusvika razero) - iri nyore rounding uko kurasa kuti digits "mamwe".
4. Rounding kuti nhamba yakakwirira - kana zviratidzo vanoda kumativi, kwete zero, ipapo nhamba iri vakagumisa. nzira kwakadaro rinoshandiswa rubatsiro kana vogadzira dzaishandisa.
5. A non-razero rounding - nhamba vakagumisa maererano nemirau, asi kana mugumisiro inofanira 0, ipapo rounding zvinoitwa "kubva muvare".
6. The rakatumbuka rounding - apo N + 1 akaenzana 5, nhamba muchichinjana iri vakagumisa mu rezasi, zvikuru divi.

Somuenzaniso, unofanira kumativi nhamba 21,837 kusvika hundredths. Pashure rounding mhinduro yako yakarurama inofanira kuva 21,84. Tsanangura nei. Figure 8 Rinowanikwawo wegumi zvinoyerera, saka, mu zvinoyerera 3 hundredths, uye 7 - zana. 7 anopfuura 5, saka tinowedzera 3-ku 1, kureva kuti, kusvika 4. Zviri nyore kana uchiziva munhu mitemo shoma:

1. yokupedzisira anoramba Nhamba achisimuka mumwe chiitiko kuti chakakandirwa wokutanga pamberi payo - kupfuura 5. Kana nhamba 5, uye shure kwayo kuchine dzimwe nemifananidzo, rapfuura anonziwo yakawedzera 1.

Somuenzaniso, tinofanira kumativi kusvika wegumi: 54.69 = 54.7, kana 7.357 = 7.4.

Kana iwe akabvunza mubvunzo sei kumativi nhamba maviri grade nzvimbo, vanoita saizvozvo kusvikira pamusoro apa.

2. yokupedzisira anoramba nhamba inoramba kuchinja kana rokutanga chakakandirwa, inomira pamberi zviri zvishoma pane 5.

Muenzaniso: 96.71 = 96.7.

3. wokupedzisira zvakachengetwa nhamba kuramba kuchinja, chero bedzi kuti kunyange, uye kana wekutanga chakakandirwa - nhamba 5, uye shure payo hapasisina chero nenhamba. Kana reserves vazvionere - Zvinoshamisa, zvikava 1.

Mienzaniso: 84,45 = 63,75 = 84,4 kana 63,8.

Cherechedza. Muzvikoro zvakawanda, vadzidzi kupa itsanangudzo shanduro rounding mitemo, saka unofanira kuchengeta ichi mupfungwa. Vose nhamba kuramba kuchinja, kana vanoenda pashure nhamba kubva 0 kusvika 4 uye yakawedzera 1, akapa kuti kana pane nhamba kubva 5 kusvika 9. zvakakodzera matambudziko pamwe rounding maererano mitemo yakasimba, asi kana chikoro muchikuvadza kukwira itsanangudzo Shona, kudzivisa kusanzwisisana vanofanira kuitevedzera. Tinovimba uchanzwisisa sei kumativi nhamba maviri grade nzvimbo.

Rounding kunze upenyu zvakakodzera kuti zvivanakire kushanda nenhamba uye nhungamiro kururama. Panguva ino paiva tsanangudzo dzakadaro, somunhu Anti rounding. Somuenzaniso, apo kuverenga mavhoti upi tsvakurudzo rwakapoteredza nhamba vanoonekwa kuti zvakaipa chimiro. Shops dzinoshandisawo Anti-rounding kuumba chitarisiko vatengi nani. mitengo (somuenzaniso, nyora 199 panzvimbo 200). Tinovimba kuti mubvunzo sei kuvandudza nhamba kuna hundredths kana nezvegumi, zvino unogona kupindura pachako.