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Updated Apr 8, 2026

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Kako množiti in deliti ulomke: Preprosta navodila

Množenje in deljenje ulomkov je pomembna veščina, ki jo potrebuješ... Show more

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# Množenje in deljenje ulomkov

Uvod v množenje in deljenje ulomkov

To poglavje je nadaljevanje ulomkov. Naučili se bomo, kako ulomke množi

Osnove ulomkov in ključni pojmi

Preden se lotimo računanja, si osvežimo osnove. Števec je zgornje število v ulomku in pove, koliko delov imamo. Imenovalec pa je spodnje število, ki pove, na koliko delov je razdeljena celota.

Krajšanje ulomkov je super trik za lažje računanje - števec in imenovalec deliš z istim številom. Na primer: $\frac{6}{8}$ postane $\frac{3}{4}$ , če oba delimo z 2.

Obratna vrednost ulomka dobiš tako, da zamenjašs števec in imenovalec. To boš potreboval pri deljenju - iz $\frac{2}{5}$ dobiš $\frac{5}{2}$ .

💡 Nasvet: Vsako celo število lahko zapišeš kot ulomek z imenovalcem 1. Tako postane 5 kar $\frac{5}{1}$ .

Množenje ulomkov

Množenje ulomkov je precej preprosto! Če množiš ulomek z običajnim številom, pomnožiš samo števec. Imenovalec ostane isti. Tako je $3 \times \frac{2}{7} = \frac{6}{7}$.

Pri množenju ulomka z ulomkom velja zlatno pravilo: števec krat števec, imenovalec krat imenovalec. Formula je $\frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d}$ .

Vendar tu pride najbolj pomemben nasvet - vedno najprej krajšaj, šele potem množi! Lahko krajšaš "navzkrižno" ali navpično. To ti prihrani veliko dela in možnosti za napake.

💡 Preizkusi: Pri $\frac{4}{9} \times \frac{3}{8}$ lahko 4 in 8 deliš s 4, ter 3 in 9 s 3. Tako dobiš $\frac{1}{3} \times \frac{1}{2} = \frac{1}{6}$ .

Deljenje ulomkov

Pri deljenju ulomkov si zapomni glavno pravilo: deljenje je množenje z obratno vrednostjo. To pomeni, da prvi ulomek prepišeš, drugi pa obrneš.

Ko deliš ulomek z običajnim številom, najprej to število zapiši kot ulomek (z imenovalcem 1). Potem uporabi pravilo za deljenje. Recimo $\frac{2}{5} \div 3$ postane $\frac{2}{5} \times \frac{1}{3}$ .

Pri deljenju ulomka z ulomkom uporabi formulo: $\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}$ . Prvi ulomek ostane isti, drugega pa obrneš in znak deljenja spremeniš v množenje.

💡 Pozor: Pogosta napaka je, da obrneš oba ulomka. Obrniti moraš samo drugega!

Praktični primeri in reševanje

Besedne naloge z ulomki so lažje, kot se zdijo. Beseda "od" v matematiki pogosto pomeni množenje. Če je Anja pojedla $\frac{1}{4}$ pice, Jure pa $\frac{1}{2}$ od Anjinega dela, moraš izračunati $\frac{1}{2} \times \frac{1}{4} = \frac{1}{8}$ .

Pri deljenju si predstavljaj razdeljevanje. Če imaš $\frac{3}{4}$ litra soka in ga razdeliš v kozarce po $\frac{1}{8}$ litra, račun je $\frac{3}{4} \div \frac{1}{8}$ . To postane $\frac{3}{4} \times \frac{8}{1} = 6$ kozarcev.

Rezultat vedno okrajšaj do konca. Če je števec večji od imenovalca $npr. $\frac{7}{3}$$ , ga spremeni v mešano število $2\frac{1}{3}$ .

💡 Ključno: Ne meša seštevanja z množenjem! Pri množenju in deljenju NE iščeš skupnega imenovalca.

Povzetek za ponavljanje

Za uspeh na testih si zapomni te tri ključne stvari. Množenje ulomkov: števec krat števec, imenovalec krat imenovalec - $\frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d}$ .

Deljenje ulomkov: prvi ulomek prepišeš, drugega obrneš in množiš - $\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}$ . Naravno število vedno lahko zapišeš kot ulomek z imenovalcem 1.

Najbolj pomembno: vedno najprej krajšaj, šele potem računaj. Tako bodo števila manjša in manj verjetno boš naredil napako. Rezultat mora biti vedno okrajšan do konca.

💡 Za test: Krajiš lahko pred množenjem, ne pa pred seštevanjem. To je pogosta napaka, ki se ji izogni!

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Matematika

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102

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Updated Apr 8, 2026

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5 pages

Kako množiti in deliti ulomke: Preprosta navodila

Množenje in deljenje ulomkov je pomembna veščina, ki jo potrebuješ za računanje delov od delov - na primer, koliko je polovica od treh četrtin pice. Te postopke boš uporabljal v vseh nadaljnjih matematičnih temah, zato je ključno, da jih dobro... Show more

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Osnove ulomkov in ključni pojmi

Krajšanje ulomkov je super trik za lažje računanje - števec in imenovalec deliš z istim številom. Na primer: $\frac{6}{8}$ postane $\frac{3}{4}$ , če oba delimo z 2.

Obratna vrednost ulomka dobiš tako, da zamenjašs števec in imenovalec. To boš potreboval pri deljenju - iz $\frac{2}{5}$ dobiš $\frac{5}{2}$ .

💡 Nasvet: Vsako celo število lahko zapišeš kot ulomek z imenovalcem 1. Tako postane 5 kar $\frac{5}{1}$ .

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Množenje ulomkov

Množenje ulomkov je precej preprosto! Če množiš ulomek z običajnim številom, pomnožiš samo števec. Imenovalec ostane isti. Tako je $3 \times \frac{2}{7} = \frac{6}{7}$.

Pri množenju ulomka z ulomkom velja zlatno pravilo: števec krat števec, imenovalec krat imenovalec. Formula je $\frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d}$ .

Vendar tu pride najbolj pomemben nasvet - vedno najprej krajšaj, šele potem množi! Lahko krajšaš "navzkrižno" ali navpično. To ti prihrani veliko dela in možnosti za napake.

💡 Preizkusi: Pri $\frac{4}{9} \times \frac{3}{8}$ lahko 4 in 8 deliš s 4, ter 3 in 9 s 3. Tako dobiš $\frac{1}{3} \times \frac{1}{2} = \frac{1}{6}$ .

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Deljenje ulomkov

Pri deljenju ulomkov si zapomni glavno pravilo: deljenje je množenje z obratno vrednostjo. To pomeni, da prvi ulomek prepišeš, drugi pa obrneš.

💡 Pozor: Pogosta napaka je, da obrneš oba ulomka. Obrniti moraš samo drugega!

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Access to all documents

Improve your grades

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Praktični primeri in reševanje

Rezultat vedno okrajšaj do konca. Če je števec večji od imenovalca $npr. $\frac{7}{3}$$ , ga spremeni v mešano število $2\frac{1}{3}$ .

💡 Ključno: Ne meša seštevanja z množenjem! Pri množenju in deljenju NE iščeš skupnega imenovalca.

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

Povzetek za ponavljanje

Za uspeh na testih si zapomni te tri ključne stvari. Množenje ulomkov: števec krat števec, imenovalec krat imenovalec - $\frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d}$ .

Najbolj pomembno: vedno najprej krajšaj, šele potem računaj. Tako bodo števila manjša in manj verjetno boš naredil napako. Rezultat mora biti vedno okrajšan do konca.

💡 Za test: Krajiš lahko pred množenjem, ne pa pred seštevanjem. To je pogosta napaka, ki se ji izogni!

We thought you’d never ask...

What is the Knowunity AI companion?

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

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App Store

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Stefan S

iOS user

Samantha Klich

Android user

Anna

iOS user

Thomas R

iOS user

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

Elisha

iOS user

Paul T

iOS user

Stefan S

iOS user

Samantha Klich

Android user

Anna

iOS user

Thomas R

iOS user

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

Elisha

iOS user

Paul T

iOS user