Te tātai taketake: whakamāramatanga, tauira

I roto i tenei whakaputanga, ka whai whakaaro tatou ki nga whakamaramatanga, nga tauira whaanui me nga tauira o nga mahi tatau (pangangarau) taketake e 4 me nga tau: te taapiri, te tangohanga, te whakarea me te wehenga.

Tāpiri

Tāpiri he mahi pangarau ka puta Tuhinga.

Tapeke (s) tau a₁, a₂... a_n ka whiwhi ma te taapiri i a raatau, ara s = a₁ + a₂ +… + A_n.

• s – tapeke;
• a₁, a₂... a_n – kupu.

Ko te taapiri he tohu motuhake "+" (me), me te nui - "Σ".

tauira: kimihia te tapeke o nga tau.

1) 3, 5 me te 23.

2) 12, 25, 30, 44.

Ngā Whakautu:

1) 3 + 5 + 23 = 31

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

Tango

te tango tau he kōaro o te mahi pāngarau tāpiri, nā reira ka puta rereke (c). Hei tauira:

c = a₁ - b₁ - b₂ – … – b_n

• c – rerekētanga;
• a₁ – whakaheke;
• b₁, b₂... b_n – ka taea te tango.

Ko te tangohanga he tohu motuhake "-" (minus).

tauira: kimihia te rereketanga o nga tau.

1) 62 haunga te 32 me te 14.

2) 100 haunga te 49, 21 me te 6.

Ngā Whakautu:

1) 62 – 32 – 14 = 16.

2) 100 – 49 – 21 – 6 = 24.

Whakamatau

Whakamatau he mahi tatau e tatau ana hanganga.

Mahi (p) tau a₁, a₂... a_n ka tātaihia mā te whakarea, arā p = a₁ · KUA₂ · … · a_n.

Ko te whakareatanga he tohu motuhake "·" or "x".

tauira: kimihia te hua o nga tau.

1) 3, 10 me te 12.

2) 7, 1, 9 me 15.

Ngā Whakautu:

1) 3 · 10 · 12 = 360.

2) 7 1 9 15 = 945.

Division

Te wehenga tau ko te kōaro o te whakareatanga, nā te poto ka tātaihia tūmataiti (d). Hei tauira:

d = a : b

• d – tūmataiti;
• a – tiritiri tatou;
• b – wehewehe.

Ko te wehenga e tohuhia ana e nga tohu motuhake ":" or "/".

tauira: kimihia te wahanga.

1) Ka whakawehea te 56 ki te 8.

2) Wehea te 100 ki te 5, ka 2.

Ngā Whakautu:

1) 56 : 8 = 7.

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