Zlomky a desatinné čísla stretávaš každý deň - keď si... Show more
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Updated Mar 12, 2026
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Zlomky a desatinné čísla - Jednoduchý návod
1 / 6
Prehľad a základné pojmy
Každý zlomok má tri súčasti - čitateľa (číslo hore), menovateľa (číslo dole) a zlomkovú čiaru medzi nimi. Predstav si to ako pizzu: ak je rozdelená na 8 kúskov a ty zješ 3, zjedol si 3/8 pizze.
Desatinné čísla fungují podobne, len používajú desatinnú čiarku namiesto zlomkovej. Číslo 1,50 € znamená jedno euro a päťdesiat centov - jednoduché!
Pamätaj si, že menovateľ nikdy nesmie byť nula a že zlomok môžeš rozšíriť (vynásobiť obe čísla rovnakým číslom) alebo skrátiť (vydeliť obe čísla rovnakým číslom).
Tip: Zlomková čiara vlastne znamená delenie - to ti pomôže pri prevodoch!
Ako fungujú zlomky a desatinné čísla
Zlomok ti hovorí príbeh: menovateľ (spodné číslo) je ako veľkosť kúskov, čitateľ (horné číslo) je koľko takých kúskov máš. Čím väčší menovateľ, tým menšie kúsky!
Pri desatinných číslach má každé miesto za čiarkou svoju hodnotu. Prvé miesto sú desatiny (0,1), druhé stotiny (0,01), tretie tisíciny (0,001). Je to ako peniaze - eurá, desaťcenty, centy.
Základný tvar zlomku je keď už nejde ďalej skrátiť. To je dôležité - na teste musíš výsledok vždy uviesť v základnom tvare!
Nezabudni: Vždy skontroluj, či môžeš zlomok ešte skrátiť!
Prevod zlomku na desatinné číslo
Toto je najjednoduchšia časť! Zlomková čiara znamená delenie, takže stačí vydeliť čitateľa menovateľom. Napríklad 3/4 = 3 ÷ 4 = 0,75.
Niektoré prevody si zapamätaj nazpamäť - ušetrí ti to čas na teste. 1/2 = 0,5, 1/4 = 0,25, 3/4 = 0,75, 1/5 = 0,2.
Ak je menovateľ 10, 100 alebo 1000, je to extra ľahké. 7/10 = 0,7, 23/100 = 0,23. Jednoducho presunď desatinnú čiarku!
Pozor: Ak výsledek nie je konečný , zaokrúhli ho podľa zadania!
Prevod desatinného čísla na zlomok
Tu musíš dávať pozor na počet desatinných miest. Jedno miesto = menovateľ 10, dve miesta = menovateľ 100, tri miesta = menovateľ 1000.
Napríklad 0,25 má dve desatinné miesta, takže je to 25/100. Teraz skrátim na základný tvar: 25/100 = 1/4 (obe čísla vydelím 25).
Pri číslach ako 1,75 rozdeľ to na celú časť (1) a desatinnú časť (0,75). Desatinnú časť preveď na zlomok a pridaj k celej časti: 1 + 3/4 = 1¾.
Dôležité: Vždy skrátim zlomok na základný tvar, inak je to chyba!
Riešené príklady a časté chyby
Skúsme si to: 3/8 na desatinné číslo = 3 ÷ 8 = 0,375. A opačne: 0,6 = 6/10 = 3/5 (skrátil som delením 2).
Najčastejšie chyby: Nezabudnúť skrátiť na základný tvar, pomýliť si čitateľa s menovateľom, alebo zle umiestniť desatinnú čiarku.
Ak máš čas na teste, skontroluj si výsledok tým, že ho prevedieš naspäť. Ak z 3/4 dostaneš 0,75 a z 0,75 zase 3/4, je to správne!
Rada: Nauč sa nazpamäť základné prevody - ušetrí ti to veľa času!
Zhrnutie pre test
Zapamätaj si tieto kľúčové kroky: Zlomok → desatinné číslo = vydeľ čitateľa menovateľom. Desatinné číslo → zlomok = urob zlomok s menovateľom 10/100/1000 podľa počtu desatinných miest, potom skráť.
Základné prevody na zapamätanie: 1/2 = 0,5, 1/4 = 0,25, 3/4 = 0,75, 1/5 = 0,2, 1/10 = 0,1.
Toto všetko budeš potrebovať nielen na test, ale aj v praktickom živote - pri varení, nakupovaní či meraní. Zvládneš to!
Záver: Prevody medzi zlomkami a desatinnými číslami sú jednoduchšie, než vyzerajú!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
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.
Most popular content in Matematika
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
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
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
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
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
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
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
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
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Zlomky a desatinné čísla - Jednoduchý návod
Zlomky a desatinné čísla stretávaš každý deň - keď si delíš čokoládu s kamošmi, počítaš peniaze alebo meriš čas. Sú to len rôzne spôsoby, ako zapísať časť nejakého celku!
Prehľad a základné pojmy
Každý zlomok má tri súčasti - čitateľa (číslo hore), menovateľa (číslo dole) a zlomkovú čiaru medzi nimi. Predstav si to ako pizzu: ak je rozdelená na 8 kúskov a ty zješ 3, zjedol si 3/8 pizze.
Desatinné čísla fungují podobne, len používajú desatinnú čiarku namiesto zlomkovej. Číslo 1,50 € znamená jedno euro a päťdesiat centov - jednoduché!
Pamätaj si, že menovateľ nikdy nesmie byť nula a že zlomok môžeš rozšíriť (vynásobiť obe čísla rovnakým číslom) alebo skrátiť (vydeliť obe čísla rovnakým číslom).
Tip: Zlomková čiara vlastne znamená delenie - to ti pomôže pri prevodoch!
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Ako fungujú zlomky a desatinné čísla
Zlomok ti hovorí príbeh: menovateľ (spodné číslo) je ako veľkosť kúskov, čitateľ (horné číslo) je koľko takých kúskov máš. Čím väčší menovateľ, tým menšie kúsky!
Pri desatinných číslach má každé miesto za čiarkou svoju hodnotu. Prvé miesto sú desatiny (0,1), druhé stotiny (0,01), tretie tisíciny (0,001). Je to ako peniaze - eurá, desaťcenty, centy.
Základný tvar zlomku je keď už nejde ďalej skrátiť. To je dôležité - na teste musíš výsledok vždy uviesť v základnom tvare!
Nezabudni: Vždy skontroluj, či môžeš zlomok ešte skrátiť!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Prevod zlomku na desatinné číslo
Toto je najjednoduchšia časť! Zlomková čiara znamená delenie, takže stačí vydeliť čitateľa menovateľom. Napríklad 3/4 = 3 ÷ 4 = 0,75.
Niektoré prevody si zapamätaj nazpamäť - ušetrí ti to čas na teste. 1/2 = 0,5, 1/4 = 0,25, 3/4 = 0,75, 1/5 = 0,2.
Ak je menovateľ 10, 100 alebo 1000, je to extra ľahké. 7/10 = 0,7, 23/100 = 0,23. Jednoducho presunď desatinnú čiarku!
Pozor: Ak výsledek nie je konečný , zaokrúhli ho podľa zadania!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
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Prevod desatinného čísla na zlomok
Tu musíš dávať pozor na počet desatinných miest. Jedno miesto = menovateľ 10, dve miesta = menovateľ 100, tri miesta = menovateľ 1000.
Napríklad 0,25 má dve desatinné miesta, takže je to 25/100. Teraz skrátim na základný tvar: 25/100 = 1/4 (obe čísla vydelím 25).
Pri číslach ako 1,75 rozdeľ to na celú časť (1) a desatinnú časť (0,75). Desatinnú časť preveď na zlomok a pridaj k celej časti: 1 + 3/4 = 1¾.
Dôležité: Vždy skrátim zlomok na základný tvar, inak je to chyba!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Riešené príklady a časté chyby
Skúsme si to: 3/8 na desatinné číslo = 3 ÷ 8 = 0,375. A opačne: 0,6 = 6/10 = 3/5 (skrátil som delením 2).
Najčastejšie chyby: Nezabudnúť skrátiť na základný tvar, pomýliť si čitateľa s menovateľom, alebo zle umiestniť desatinnú čiarku.
Ak máš čas na teste, skontroluj si výsledok tým, že ho prevedieš naspäť. Ak z 3/4 dostaneš 0,75 a z 0,75 zase 3/4, je to správne!
Rada: Nauč sa nazpamäť základné prevody - ušetrí ti to veľa času!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Zhrnutie pre test
Zapamätaj si tieto kľúčové kroky: Zlomok → desatinné číslo = vydeľ čitateľa menovateľom. Desatinné číslo → zlomok = urob zlomok s menovateľom 10/100/1000 podľa počtu desatinných miest, potom skráť.
Základné prevody na zapamätanie: 1/2 = 0,5, 1/4 = 0,25, 3/4 = 0,75, 1/5 = 0,2, 1/10 = 0,1.
Toto všetko budeš potrebovať nielen na test, ale aj v praktickom živote - pri varení, nakupovaní či meraní. Zvládneš to!
Záver: Prevody medzi zlomkami a desatinnými číslami sú jednoduchšie, než vyzerajú!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
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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Most popular content in Matematika
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Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
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
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
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
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
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
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
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
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user