# 3.25 Om probleme op te los wat bewerkings en die herleiding van

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## Memorandum

1.1 2 h 16 min = 18 h 8 min

2 h 16 min + 15 h 52 min = 17 h 68 min

1.2 15 h - 8 h 27 min = 6 h 33 min

15 h 00 min - 8 h 27 min = 6 h 33 min

1.3 8 h 6 min - 2 h 45 min = 5 h 21 min

8 h 06 min – 2 h 45 min = 5 h 21 min

1.4 12 × 3 h 48 min = 45 h 36 min

12 × 3 h 48 min = 36 h 576 min

1.5 4 h 30 min ÷ 15 min = 18

270 min ÷ 15 min

2.1 16 h 10 min – 10 h 00 min = 6 h 10 min

6 h 10 min – 50 min = 5 h 20 min

a) 1 h 30 min

b) 35 min

c) 6 h 5 min

d) 4 h

## Aktiwiteit: om probleme op te los wat bewerkings en die herleiding van tydeenhede insluit [lu 4.2]

Ons gaan ook sommer kyk of jy nog kan onthou hoe om met tyd op te tel en af te trek!

1. Bereken die volgende:

1.1 2 h 16 min + 15 h 52 min = ___________h___________min

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.2 15 h – 8 h 27 min = ___________h___________min

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.3 8 h 6 min – 2 h 45 min = ___________h___________min

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.4 12 × 3 h 48 min = ___________h___________min

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.5 4 h 30 min ÷ 15 min = _________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

2. Skryf duidelike getalsinne met die oplossing van die volgende probleme:

2.1 ’n Krieketwedstryd het om 10:00 begin en om 16:10 klaargemaak. Hoeveel tyd is aan die spel afgestaan, indien daar twee 10 minute-ruskanse en ’n middagete van 30 minute was?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

2.2 Hier volg Gerda se klasrooster vir Maandae.

a) Hoeveel tyd word aan Engels afgestaan?_________________________________

b) Hoe lank is die pouses saam?____________________________________

c) Hoe lank is die skooldag?________________________________________

d) Indien sy nege Afrikaanse periodes per week het, hoeveel uur is dit? _____________________________________________________________________

## Assessering

Leeruitkomste 4: Die leerder is in staat om gepaste meeteenhede, instrumente en formules in ‘n verskeidenheid kontekste te gebruik.

Assesseringstandaard 4.2: Dit is duidelik wanneer die leerder probleme oplos wat berekeninge met en herleiding tussen geskikte tydeenhede behels, insluitend tydsones en –verskille.

what is the stm
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how did you get the value of 2000N.What calculations are needed to arrive at it
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