Kubvisa kwenhamba-mbiri-manhamba, matatu-manhamba uye manhamba akawanda nekoromo

Muchinyorwa chino, tichatarisa mitemo uye mienzaniso inoshanda yekuti nhamba dzechisikigo (madhiji maviri, matatu-madhijiti uye akawanda-madhijiti) anogona kubviswa sei mukoramu.

Kubvisa Mitemo

Kuti uwane mutsauko pakati penhamba mbiri kana kupfuura nechero nhamba yemanhamba, unogona kuita mutsara wekubvisa. Nokuda kweizvi:

1. Nyora minuend mumutsetse wepamusoro-soro.
2. Pasi payo tinonyora subtrahend yekutanga - nenzira yekuti madhijiti akafanana enhamba mbiri dziri pasi peumwe (makumi pasi pemakumi, mazana pasi pemazana, nezvimwewo)
3. Nenzira imwecheteyo, tinowedzera mamwe ma subtrahends, kana aripo. Nekuda kweizvozvo, makoramu ane manhamba akasiyana anoumbwa.
4. Dhirowa mutsara wakachinjika pasi penhamba dzakanyorwa, iyo inoparadzanisa minuend uye yakabviswa kubva pamusiyano.
5. Ngatienderei pakubvisa manhamba. Iyi nzira inoitwa kubva kurudyi kuenda kuruboshwe, zvakasiyana kune imwe neimwe column, uye mhedzisiro inonyorwa pasi pemutsara mukoramu imwechete. Pane maviri nuances pano:
   • Kana iyo nhamba mu subtrahend isingakwanise kubviswa kubva padhijiti muminuend, saka tinotora gumi kubva kune yakakwira digit, uye isu tinofanira kuzvifunga mune zvimwe zviito. (ona Muenzaniso 2).
   • Kana iyo minuend iri zero, izvi zvinoreva kuti kuti utore kubvisa, unofanirwa kukwereta kubva kune inotevera digit. (ona Muenzaniso 3).
   • Dzimwe nguva, semugumisiro we "chikwereti", panogona kunge pasina manhamba akasara mudhijiti yepamusoro (ona Muenzaniso 4).
   • Muzviitiko zvisingawanzoitiki, kana paine zvakawanda zvinobviswa, zvinodikanwa kutora kwete imwe, asi maviri kana anopfuura gumi nemaviri kamwechete. (ona Muenzaniso 5).

Column Kubvisa Mienzaniso

muenzaniso 1

Bvisa 25 kubva pa68.

muenzaniso 2

Ngativerengei musiyano pakati penhamba: 35 ne17.

Tsanangudzo:

Sezvo 5 isingagoni kubviswa panhamba 7, tinotora gumi kubva pachiyero chakakosha. Zvinobuda 5 + = 10 15, 15-7 8 =. Uye usakanganwa kubvisa gumi rakabatikana kubva muchikamu chinoenderana, kureva 3-1=2-1=1.

muenzaniso 3

Bvisa nhamba 46 kubva pa70.

Tsanangudzo:

Nekuti 6 haikwanise kubviswa kubva paziro, tinotora gumi. Naizvozvo, 0 + = 10 10, 10-6 4 =. Ipapo isu tinofunga nezvegumi zvakabatikana mushure mekubvisa mune inotevera digit, kureva 7-4-1 = 2.

muenzaniso 4

Ngatitsvage mutsauko pakati pemanhamba-maviri uye matatu manhamba: 182 uye 96.

Tsanangudzo:

Kubvisa 2 kubva panhamba 6 hazvishande, saka tinotora gumi. Tinowana 2 + = 10 12, 12-6 6 =. Inoramba iri mumakumi 8-1 7 =, asi 7 haigone kubviswa kubva pa9 zvakare, saka tinokwereta gumi kubva kumazana: 7 + = 10 17, 17-9 8 =. Nokudaro, hapana chinosara mumazana pachawo, nokuti 1-1 0 =.

muenzaniso 5

Bvisa kubva muna 1465 nhamba 357, 214 uye 78.

Tsanangudzo:

Muchiitiko ichi, tinoita zviito zvakafanana semumienzaniso yapfuura. Musiyano chete ndewekuti kana uchibvisa mukoramu ine mauniti, inodiwa kutora kwete imwe chete, asi makumi maviri panguva imwe chete, kureva. 5 + = 20 25, 25-7-4-8 = 6. Panguva imwecheteyo, icharamba iri muchikwata chegumi 4 (6-2).