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Desimale breuke

Opvoeders afdeling


17.2 a) 999,955

  1. 802,383
  2. 115,749
  3. 420,799

18. 0,1818181



Bg. is repeterende breuke

Afgerond is antwoord 1


a) 1

b) 3,3

c) 0,67

d) 4,3

e) 6,4

f) 2,7

g) 3,4

h) 1,25

i) 1,05

j) 6,7



m) 5

n) 8,6

o) 8,2

Leerders afdeling


Aktiwiteit: optelling en aftrekking van desimale breuke [lu 1.7.4]


17.1 Onthou jy nog?

Om desimale breuke op te tel en af te trek, is baie maklik! Ons doen dit presies net soos ons heelgetalle sou optel of aftrek.

Maak net seker dat:

  • Die tiendes in die tiendes-kolom staan
  • Die honderdstes in die honderdstes-kolom staan
  • Die duisendstes in die duisendstes-kolom staan

17.2 Bereken:

a) n = 284,523 + 715,432

b) d = 476,897 + 325,486

c) k = 532,298 – 416,549

d) b = 785,361 – 364,562


Skryf twee elfdes as ’n desimale breuk. Skryf dan nege elfdes as ’n desimale breuk. Tel nou jou twee antwoorde bymekaar.

Jy weet tog dat 2 elfdes plus 9 elfdes = 11 elfdes = een.Hoe verklaar jy jou bogenoemde antwoord?

19. Kom ons kyk hoe vaar jy in jou volgende hoofrekentoets.

a) 0,6 + 0,4 = .................

b) 2,4 + 0,9 = .................

c) 0,27 + 0,4 = .................

d) 5 – 0,7 = .................

e) 3,8 + 2,6 = .................

f) 3,2 – 0,5 = .................

g) 3,45 – 0,05 = .................

h) 3,45 – 2,2 = .................

i) 3,45 – 2,4 = .................

j) 2,65 + 4,05 = .................

k) 4 – 1,02 = .................

l) 0,39 + 0,73 = .................

m) 3,25 + 1,75 = .................

n) 4,9 + 3,7 = .................

o) 12 – 3,8 = .................

  • Voltooi deur ’n regmerkie in die toepaslike blokkie te maak.
Ek het
in my hoofrekentoets.


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 1.7: Dit is duidelik wanneer die leerder skat en bereken deur geskikte bewerkings vir probleme wat die volgende behels, te kies en te gebruik:

1.7.4 optelling, aftrekking.

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Source:  OpenStax, Wiskunde graad 7. OpenStax CNX. Oct 21, 2009 Download for free at http://cnx.org/content/col11076/1.2
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