learn.howToCalculate
learn.whatIsHeading
Adding fractions combines two or more parts of a whole. The key rule is that fractions must share the same denominator (bottom number) before their numerators (top numbers) can be added. This shared denominator is called the Least Common Denominator (LCD).
Trin-for-trin guide
- 1Find the Least Common Denominator (LCD) of both fractions
- 2Convert each fraction to an equivalent fraction with the LCD
- 3Add the numerators — keep the denominator the same
- 4Simplify the result by dividing by the Greatest Common Factor (GCF)
Løste eksempler
Input
1/2 + 1/3
Resultat
5/6
LCD = 6: 3/6 + 2/6 = 5/6
Input
3/4 + 2/5
Resultat
23/20
LCD = 20: 15/20 + 8/20 = 23/20
Input
1/6 + 1/6
Resultat
1/3
Same denominator: 2/6 → simplified to 1/3
Input
5/8 + 3/8
Resultat
1
Same denominator: 8/8 = 1
Klar til at beregne? Prøv den gratis Add Fractions-beregner
Prøv det selv →