How to classify numbers | Numbers and operations | 8th grade | Khan Academy

Learn how to classify numbers as whole numbers, integers, rational numbers, and irrational numbers.

Missed the previous lesson?

8th grade on Khan Academy: 8th grade is all about tackling the meat of algebra and getting exposure to some of the foundational concepts in geometry. If you get this stuff (and you should because you're incredibly persistent), the rest of your life will be easy. Okay, maybe not your whole life, but at least your mathematical life. Seriously, if you really get the equations and functions stuff we cover here, most of high school will feel intuitive, even relaxing. (Content was selected for this grade level based on a typical curriculum in the United States.)

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

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[sweetg]

i love how this video is titled 8th grade but i’m trying to get this into my head as a senior

[everette.]

This guy can explain it better in 9 minutes than my teacher can in 2 hours

[FlammableMonkeys]

What is being done here is fantastic. Khan Academy helps me out with a lot of my academic Math and Science homework. I wish I could do more to support this learning program. I just hope that by watching a majority of the videos I am helping the greater cause.

[stephanieperkins]

Omg I'm in precalculus and this helped so much. I _always_ had trouble understanding rational/irrational numbers. I kinda feel dumb for not understanding this all these years lol

[cea]

I am not good at this stuff so I am confused a lot

[anwesharajaram]

He taught me what I couldn’t learn over more than two years in under ten minutes 😂🤦‍♀️thank you so much

[mohammedd]

Thanks a lot, this was helpful. But I was wondering why didn't you include imaginary numbers?

[joseph_ceciliadaniels]

thanks, this helped much test tomorrow and this saved

[diabeticalien]

OH MY GOD Thank you! I used to think all these labels for numbers were useless! I finally AAAAHHH!!!

[MajorBonMarita]

As a homebound teacher this helps my student and myself. Thanks.

[tonic-roblox]

I'm preparing for 8th grade right now and this really help!!!!

[tshegorabs]

Thanks a lot it helped me learn something new for grade8 during this lockdown thank you so much teacher😊

[merifischer]

Thank you soooo much! This is great for sixth grade math! It helped alot

[y.carson]

Ohhhh lord this helped ME to help my 8th grader!!! THANK YOU THANK YOU THANK YOU!!!🙏😁

[dristie]

Loved the last example. Really fancy :D

[DianaTran-gi]

in 6th grade but learning this and it explains so much!

[CCOLT]

Funny how we didn't learn this in grade 8 and now I'm going into grade 9 I'm so screwed

[amiraboodi]

Very helpful and remarkable. I love your videos. 🤗🏆❤️🌹

[MSFR-_]

سبحان الله وبحمده سبحان الله العظيم
استغفر الله العظيم الذي لا إله إلا هو الحي القيوم و أتوب إليه
سبحان الله وبحمده عدد خلقه ورضا نفسه وزنة عرشه ومداد كلماته
اللهم صَلِّ وسَلّمْ عَلَى نَبِيْنَا مُحَمد ﷺ

[googleaccount]

Thank you sooo muchhh this really helped a lot