Izibalo eziyisisekelo: izincazelo, izibonelo

Kulolu shicilelo, sizocubungula izincazelo, amafomula ajwayelekile kanye nezibonelo zemisebenzi emi-4 ye-arithmetic (yezibalo) enezinombolo: ukuhlanganisa, ukususa, ukuphindaphinda nokuhlukanisa.

Ukwengezwa

Ukwengezwa kuwumsebenzi wezibalo oholela ku isamba.

Isamba (s) izinombolo a₁, a₂... a_n itholakala ngokuwengeza, isb s = a₁ + a₂ +... + A_n.

• s - isamba;
• a₁, a₂... a_n - imigomo.

Ukwengeza kuboniswa uphawu olukhethekile "+" (kanye), kanye nenani - "Σ".

Isibonelo: thola isamba sezinombolo.

1) 3, 5 kanye 23.

2) 12, 25, 30, 44.

Izimpendulo:

1) 3 + 5 + 23 = 31

2) 12 + 25 + 30 + 44 = 111.

Ukuzikhipha

ukususa izinombolo ukuphambana kokusebenza kwezibalo, ngenxa yalokho kuba khona Umehluko (c). Ngokwesibonelo:

c = a₁ - b₁ - b₂ -…- b_n

• c - umehluko;
• a₁ - kuncishisiwe;
• b₁, b₂... b_n – deductible.

Ukukhipha kuboniswa uphawu olukhethekile "-" (khipha).

Isibonelo: thola umehluko phakathi kwezinombolo.

1) 62 khipha 32 futhi 14.

2) 100 khipha 49, 21 futhi 6.

Izimpendulo:

1) 62 – 32 – 14 = 16.

2) 100 – 49 – 21 – 6 = 24.

Ukuphindaphinda

Ukuphindaphinda kuwumsebenzi we-arithmetic obala ukubunjwa.

Sebenza (p) izinombolo a₁, a₂... a_n ibalwa ngokuziphindaphinda, okungukuthi p = a₁ · AT₂ · … · a_n.

Ukuphindaphinda kuboniswa izimpawu ezikhethekile "·" or "x".

Isibonelo: thola umkhiqizo wezinombolo.

1) 3, 10 kanye 12.

2) 7, 1, 9 kanye ne-15.

Izimpendulo:

1) 3 · 10 · 12 = 360.

2) 7 1 9 15 = 945.

division

Ukuhlukaniswa kwezinombolo iwukuhlanekezela kokuphindaphinda, ngenxa yokuthi kufushane kubalwa yangasese (d). Ngokwesibonelo:

d = a: b

• d - okuyimfihlo;
• a – siyabelana;
• b – umhlukanisi.

Ukuhlukana kuboniswa ngezimpawu ezikhethekile ":" or "/".

Isibonelo: thola i-quotient.

1) 56 ihlukaniswa ngo-8.

2) Hlukanisa u-100 ngo-5, bese u-2.

Izimpendulo:

1) 56 : 8 = 7.

2) 100 : 5 : 2 = 10 (100:5 = 20, 20:2 = 10).