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Wiskunde

Getalbegrip, optelling en aftrekking

Aftrekking

Opvoeders afdeling

Memorandum

1.1 27 848

1.2 18 121

1.3 254 706

2.1 8 486 – 5 456 = 3 030

84 381 – 54 351 = 30 030

86 488 – 56 455 = 30 033

816 823 – 516 523 = 300 300

814 886 – 514 556 = 300 330

2.2 297 300

3.1 (b) R27 414

3.2 (a) 22 526

(b) 65 778

(c) 668 544

Kopkrapper

(a) 378 – 111 = 267 – 110 = 157 – 10 = 147

(b) 2 598 – 1 111 = 1 487 – 1 111 = 376 – 110 = 266

(c) 14 210 – 110 = 14 100 – 100 = 14 000

LEERDERS AFDELING

Inhoud

Aktiwiteit: om ‘n reeks tegnieke te gebruik om berekeninge te doen [lu 1.10]

Om strategieë te gebruik om oplossings te kontroleer [lu 1.11]

1. Jy het nou deur verskeie metodes gewerk om die verskil te bereken. Kies nou enige van hierdie metodes en bereken die volgende:

1.1 __________ = 54 321 – 26 473

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1.2 __________= 63 904 – 45 783

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1.3 __________= 486 213 – 231 507

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2. 2.1 Kom ons jaag resies. Kyk of jy jou maat kan wen. Onthou net om netjies te werk. Kyk goed na elke getal.

  • Kyk goed na elke getal.
  • Vervang elke keer die syfer 8 deur ’n 5.
  • Skryf die nuwe getal direk daaronder neer.
  • Bereken dan die verskil tussen die twee getalle en skryf die antwoord in die heelonderste spasie neer.

Bv.

2.2 Wat is die verskil tussen die grootste en kleinste antwoord?

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2.3 Vergelyk jou antwoorde met jou maat s’n.

2.4 Kontroleer jul antwoorde met ’n sakrekenaar.

3. Nou wys ons jou nog ‘n tegniek om die verskil tussen twee getalle te bereken.

3.1 Werk weer in groepe van drie. Lees die volgende probleme goed deur en kontroleer die oplossings deur dit vir mekaar te verduidelik.

a) Kayla se pa koop ’n splinternuwe Renault Scenic vir R147 293 en Wayne se pa ’n tweedehandse motor vir R69 475. Watter bedrag het Kayla se pa meer betaal?

Kayla se pa betaal R77 818 meer.

b) Roberto moet baie oorsee bel en sy telefoonrekening is gevolglik R30 000. Carli gebruik haar selfoon om oproepe te maak en haar rekening beloop R2 586. Met watter bedrag was Carli se telefoonrekening minder?

Carli betaal R27 414 minder.

3.2 Bereken die volgende deur bogenoemde metode te gebruik:

a) __________= 42 063 – 19 537

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b) __________= 264 136 – 198 358

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c) __________= 900 000 – 231 456

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TYD VIR SELFASSESSERING

Ons het nou na verskillende tegnieke/strategieë gekyk om berekeninge te doen en te kontroleer. Hoe voel JY oor die werk wat ons so pas afgehandel het?

Evalueer jouself deur ‘n sirkel te trek om die syfer in die toepaslike blokkie.

** HEELTEMAL ONSEKER BIETJIE SEKER REDELIK SEKER DOOD­SEKER
Ek kan korrek afrond tot die naaste 1 000 1 2 3 4
Ek kan aftrek deur by te tel 1 2 3 4
Ek kan die verskil d.m.v. afronding bereken 1 2 3 4
Ek kan aftrek deur getalle in uitgebreide notasie te hergroepeer 1 2 3 4
Ek kan met negatiewe getalle werk 1 2 3 4
Ek kan vertikaal aftrek 1 2 3 4

** Vra jou opvoeder se hulp.

Kopkrapper!

Jy mag net die volgende sleutels van jou sakrekenaar gebruik:

1 ; – ; 0 ; =

Kyk of jy die eerste getal na die tweede getal kan verander.

Bv . Verander 1 416 na 285

1 416 – 1 110 = 306 – 11 = 295 – 10 = 285

a) Verander 378 na 147

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b) Verander 2 598 na 266

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c) Verander 14 210 na 14 000

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Assessering

Leeruitkomste 1: Die leerder is in staat om getalle en die verwantskappe daarvan te herken, te beskryf en voor te stel, en om tydens probleemoplossing bevoeg en met selfvertroue te tel, te skat, te bereken en te kontroleer.

Assesseringstandaard 1.10: Dit is duidelik wanneer die leerder ‘n verskeidenheid tegnieke gebruik om sowel skriftelike as hoofberekeninge met heelgetalle te doen, insluitend:

1.10.1 optelling en aftrekking in kolomme;

Assesseringstandaard 1.11: Dit is duidelik wanneer die leerder ‘n verskeidenheid strategieë gebruik om oplossings te kontroleer en die redelikheid van oplossings te beoordeel.

Questions & Answers

What are the factors that affect demand for a commodity
Florence Reply
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Eliyee
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In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
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Shukri Reply
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AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
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Shukri
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Shukri
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Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
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Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
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Jabir
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Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
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In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
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Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
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Source:  OpenStax, Wiskunde graad 5. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10993/1.1
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