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  • GETIntPhaseMaths display tagshide tags

    This module is included inLens: Siyavula: Mathematics (Gr. 4-6)
    By: Siyavula

    Review Status: In Review

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Om te bereken deur geselekteerde bewerkings

Module by: Siyavula Uploaders. E-mail the author

WISKUNDE

Getalbegrip, Optelling en Aftrekking

Aftrekking

OPVOEDERS AFDELING

Memorandum

1.1 (a) 510 (b) 810 (c) 860 (d) 1 400 (e) 1 860

1.2 (a) 800 (b) 300 (c) 2 500 (d) 1 700

2.2

a) 16 00 - 10 000 = 6 000

b) 98 000 - 46 000 = 52 000

c) 642 000 - 23 6000 = 406 000

d) 926 000 - 759 000 = 167 000

e) 2468000 - 1129000 = 1339000

LEERDERS AFDELING

Inhoud

AKTIWITEIT: Om te bereken deur geselekteerde bewerkings [LU 1.8]

1. Net soos by optelling, kan ons ook baie makliker aftrek deur die getalle af te rond. So skat ons ook sommer wat die antwoord naasteby moet wees. Werk saam met ’n maat. Maak beurte om vir mekaar die antwoorde hardop te sê. Kontroleer die antwoorde met ‘n sakrekenaar. Vra gerus jul opvoeder se hulp waar nodig.

1.1 Trek af deur beide getalle af te rond tot die naaste 10:

a) 567 – 63

b) 901 – 87

c) 885 – 25

d) 1 454 – 49

e) 1 999 – 138

1.2 Rond beide getalle af tot die naaste 100 en trek af:

a) 973 – 214

b) 1 259 – 993

c) 6 048 – 3 512

d) 9 999 – 8 234

2. Kom ons kyk na maniere om die verskil tussen groot getalle te bereken.

2.1 Kan jy nog onthou?

Verduidelik aan ’n maat hoe ons afrond tot die naaste 1 000.

2.2 Voltooi die tabel deur af te rond tot die naaste 1 000:

Tabel 1
  GETAL 1 GETAL 2 VERSKIL
Bv. 4 386 – 1 274 4 000 1 000 3 000
a) 15 980 – 9 621 .......................... .......................... ..........................
b) 98 102 – 46 147 .......................... .......................... ..........................
c) 642 368 – 236 419 .......................... .......................... ..........................
d) 926 135 – 758 910 .......................... .......................... ..........................
e) 2 468 265 – 1 128 651 .......................... .......................... ..........................

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 1.8: Dit is duidelik wanneer die leerder skat en bereken deur geskikte bewerkings vir die oplossing van probleme te gebruik:

1.8.1 afronding tot die naaste 5, 10, 100 of 1 000;

1.8.2 optel en aftrek van heelgetalle met minstens 5 syfers.

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Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

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