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• GETIntPhaseMaths

This module and collection are included inLens: Siyavula: Mathematics (Gr. 4-6)
By: Siyavula

Module Review Status: In Review
Collection Review Status: In Review

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Course by: Siyavula Uploaders. E-mail the author

# Om hoofreken te kan doen

Module by: Siyavula Uploaders. E-mail the author

Memorandum

1. 62; 63

2.1 9

2.2 132

2.3 17

2.4 331

2.5 498

2.6 68.5

2.7 1 000

2.8 144

2.9 +

2.10 10

2.11 63

2.12 176

2.13 7

2.14 4

2.15 450

## Inhoud

### AKTIWITEIT: Om hoofreken te kan doen [LU 1.9.1]

1. Hier is sommer dadelik ’n uitdaging vir jou! Kyk hoeveel syfers jy in die blomtuin sien en tel hulle almal bymekaar. As jy slim te werk gaan, kan jy die antwoorde sommer in ‘n japtrap bereken! (Kan jy sien hoe?)

Wat is jou antwoord? __________________________________________________

2. Kom ons toets nou jou hoofrekenvaardighede op ‘n ander manier. As jy jou tafels ken en al goed kan optel en aftrek, sal dit geen probleem vir jou wees nie. Probeer dit binne 3 minute voltooi:

2.1 ___________ x 8 = 72

2.2 ___________ ÷ 11 = 12

2.3 119 + ____________ = 136

2.4 _____________ - 214 = 117

2.5 Dubbel 249: _________________

2.6 ‘n Halwe 137: __________________

2.7 30 x _______________ = 30 000

2.8 4 x 3 x 12 = _______________

2.9 567 ______________ 23 = 590

2.10 8 670 ÷ _____________ = 867

2.11 (5 x 9) + 18 = _____________

2.12 (7 + 15) x 8 = ______________

2.13 (42 ÷ ___________) + 14 = 20

2.14 (5 x ______________) – 9 = 11

2.15 ‘n Halwe x _________________ = 225

Voltooi deur die toepaslike blokkie in te kleur:

 Ek het GOED GEMIDDELD SWAK

#### ONTHOU JY NOG?

Die antwoord van ’n optelsom word die SOM genoem.

Kyk goed na die volgende voorbeeld:

Dus: 4 873 + 2 168 = 7 041

3. Nog ‘n bietjie hoofreken!

Bereken die antwoorde sonder ’n sakrekenaar. Gebruik die kode en voltooi dan die volgende sin:

Aftrekking word die _____________________________________ van optelling genoem.

3.1 27 + 35

3.2 48 + 16

3.3 53 + 19

3.4 23 + 37

3.5 39 + 17

3.6 15 + 24

3.7 26 + 34

 I A N K V O E 62 74 64 102 72 88 60
 B R Y S P M T 31 56 20 39 99 52 32

Ons kan ook sê aftrekking is die omgekeerde bewerking van optelling. Ek kan dus ’n optelsom toets deur af te trek.

## Assessering

Leeruitkomste 1:Die leerder is in staat om getalle en hul verwantskappe te herken, te beskryf en voor te stel. Hulle kan ook met bekwaamheid en vertroue tel, skat, bereken en kontroleer tydens die oplos van probleme.

Assesseringstandaard 1.9: Dit is duidelik wanneer die leerder hoofberekeninge uitvoer wat die volgende behels:

1.9.1: optelling en aftrekking.

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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?

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##### What are tags?

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