Dit is een Samenvatting/uitleg van rekenen van de Oefentoets Domein 2 Verhoudingen op niveau 3F.
Je kan deze uitleg van de oefentoets leren om de toets goed te maken.
Breuken omzetten in % = bovenste getal gedeeld door onderste getal en dan x 100
2 : 7 x 100 = 28,57142
Afronden op één decimaal
Antwoord: 28,6
,Vraag 2
30 gram vet = 24% van het totaal.
100% 24%
? 30 gram
30 x 100 : 24 = 125 gram
Antwoord: 125 gram
, Vraag 3
Je rekent per winkel uit hoeveel 1 fles kost.
Winkel A: 4,80 : 3 = €1,60 per fles
Winkel B: 6,60 : 4 = €1,65 per fles
Winkel C: 8,50 : 5 = €1,70 per fles
Winkel A is dus het goedkoopst.
Antwoord: A
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