Mgbakọ bụ isi: nkọwa, atụ

N'akwụkwọ a, anyị ga-atụle nkọwa, usoro izugbe na ihe atụ nke ọrụ 4 bụ isi nke mgbakọ na mwepụ (mkpokọta) nwere ọnụọgụ: mgbakwunye, mwepu, ịba ụba na nkewa.

mgbakwunye

mgbakwunye bụ ọrụ mgbakọ na mwepụ na-ebute ego.

Nchikota (s) nọmba a₁, a₂... a_n a na-enweta site n'ịgbakwunye ha, ntụgharị s = a₁ + a₂ +… + A_n.

• s - nchikota;
• a₁, a₂... a_n - okwu.

A na-egosi mgbakwunye site na akara pụrụ iche "+" (gbakwunyere), na ego - "Σ".

Ihe Nlereanya: chọta nchikota nke ọnụọgụgụ.

1) 3, 5 na 23.

2) 12, 25, 30, 44.

Azịza:

1) 3 + 5 + 23 = 31

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

Mwepu

na-ewepu ọnụọgụgụ bụ ntụgharị nke mgbakwunye mgbakọ na mwepụ ọrụ, n'ihi nke e nwere iche (c). Ọmụmaatụ:

c = a₁ - b₁ - b₂ – … – b_n

• c - iche iche;
• a₁ - belata;
• b₁, b₂... b_n - deductible.

A na-egosi mwepu site na akara pụrụ iche "-" (mwepu).

Ihe Nlereanya: chọta ọdịiche dị n'etiti ọnụọgụgụ.

1) 62 min 32 na 14.

2) 100 mwepu 49, 21 na 6.

Azịza:

1) 62-32-14 = 16.

2) 100 - 49 - 21 - 6 = 24.

Ntinyeghari

Ntinyeghari bụ ọrụ mgbakọ na mwepụ na-agbakọ mejupụtara.

Ọrụ (p) nọmba a₁, a₂... a_n a na-agbakọ site n'ịba ụba ha, ya bụ p = a₁ · nwere₂ · … · a_n.

A na-egosipụta mmụba site na akara pụrụ iche "·" or "x".

Ihe Nlereanya: chọta ngwaahịa nke ọnụọgụgụ.

1) 3, 10 na 12.

2) 7, 1, 9 na 15.

Azịza:

1) 3 · 10 · 12 = 360.

2) 7 1 9 15 = 945.

Division

Nkewa ọnụọgụgụ bụ ntụgharị nke ịba ụba, n'ihi nke mkpụmkpụ na-agbakọọ onwe (d). Ọmụmaatụ:

d = a: b

• d - nzuzo;
• a – anyị na-ekekọrịta;
• b - nkesa.

E gosipụtara nkewa ahụ site na akara pụrụ iche ":" or "/".

Ihe Nlereanya: chọta quotient.

1) 56 na-ekewa site na 8.

2) Kewaa 100 site na 5, wee site na 2.

Azịza:

1) 56:8 = 7.

2) 100: 5: 2 = 10100:5 = 20, 20:2 = 10).