Number System Class 9 Maths Chapter 1 Concepts, Formulas | CBSE Class 9 Exams | BYJU'S- Class 9 & 10

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In today's session, we will be studying Number System Class 9 Chapter 1 Concepts, Formulas CBSE Class 9 Maths Chapter 1. You are watching this video on @BYJU'S - Class 9 & 10
If you want to ace the exam with a perfect strategy and complete your syllabus comprehensively then this is the only educational channel you need. We advise you to watch the whole session to be able to study and boost your score for CBSE Class 9.
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00:00 Number System Concepts Part-1
2:04 Flow of the Session
2:43 Subscribe Byju’s Channels
3:16 Family of Numbers
4:50 Which of the following is an integer but not a whole number?
6:29 Fractions
7:29 Rational Numbers
11:13 Equivalent Rational Numbers
12:03 Which of the following is the equivalent rational number of 16/28?
16:37 Is -5/-7 a positive or a negative rational number?
18:07 Irrational Numbers
21:11 Which of the following is an irrational number between 5 to 10?
23:36 Decimal Expansion
25:39 Classify the following decimal expansions as either terminating or recurring
28:04 Decimal Expansion of Rational numbers
30:01 Decimal Expansion of Irrational numbers
30:42 Which type of decimal expansion the following number has?
32:49 Summary
33:21 Earth Day Campaign
34:07 Homework Question
34:26 Upcoming Session
#BYJUS #BYJUSClass9 #BYJUSClass9Maths #NUmberSystem #NumberSystemQuestions #NumberSystemClass9 #NumberSystemConcept #CBSEClass9 #CBSEClass9Maths #Class9Maths

[@BYJUSClass910]

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[@phantomgamingzoneyt]

Start

[@aayushpachar9898]

Is it online or offline

[@SrilakshmiSiva-eo5kt]

A) postive answer

[@papinanisrikanthpapinanisr4015]

hello Iam Mahitha the homework question answer is √12

[@banothkittymagicchannel3943]

👍

[@soultreegaming159]

thanks a lot it help me clarify my dout on classification between rational and irrational

[@samiya_f]

Is byjus really gonna help me in my studies..I'm very bad at it I have a hard time understanding even the basic concepts in maths...my mom asked if I wanted to join byjus classes.. so I'm not sure if it will help pls let me know...thanks

[@Lakshmi_Prasanna.]

Better u join

[@anamikaangel634]

Ma'am you teaches so well 👍🏻👍🏻that I understand really really well you are so elegant at teaching and just wow!! Oo god!!!

[@anchal1645]

Homework - Answer is option B because root 12 is not perfect sq.

[@BYJUSClass910]

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[@thearchitchoudhary]

b ) √12 = 2√3 where √3 is iraational

[@BYJUSClass910]

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[@mahaknigam5624]

Ma'am in the rational no part. There is a mistake. -1/3 is a rational no but not a fraction. In video it's mentioned -1/3 is a fraction

[@mahakclass8thbrollno207]

D -1

[@Studies187]

😊

[@SrilakshmiSiva-eo5kt]

Answer d) -1

[@SrilakshmiSiva-eo5kt]

Answer a) 4/7

[@ljeevithajeevitha1262]

Homework question ans is √12

[@BYJUSClass910]

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[@yuvrajgiri2493]

Homework Answer :√12

[@BYJUSClass910]

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[@kachigogada1316]

Pie is a rational number but 22/7 is a irrational number because that's not the exact value of pie

[@icey3688]

no pi isn't a rational number the value of pi is expressed in decimal which is non-terminating and non-repeating.

[@user-de1nv1uw5w]

I'm sure you know by now but if not: It's actually the opposite pi's value is irrational (3.14159...) while 22/7 is a rational number. For making it easier during calculations 22/7 (value: 3.14285714) is taken as the value of pi as it has the closest value to pi :)

[@kreyalp920]

pi is irrational but 22/7 isnt

[@ailiancepradhan4031]

❤

[@ramagupta8237]

🖒

[@nandaprem3286]

Mam is clear

[@amindeshmukh2958]

Minus 1

[@poonamdevipoonamdevi2738]

☺️☺️

[@devendersinghchauhanchauha5811]

👍👍

[@maheshamma.k3967]

hi mam

[@sunitaptasad4245]

😊😊

[@manjukumari1324]

Positive

[@NagayyaBandaru]

Super explanation mam i passed exam

[@arnavraj1268]

hello I am wageesha and 4/7 is the correct answer

[@sunitaptasad4245]

Mam it's clear

[@chinukapil5001]

Hiimam

[@Harwinder.152]

Clear 👍👍

[@mahakclass8thbrollno207]

Hello mam I am Mahak class 8th B roll no 20 my school name is kendriya vidyalaya no 3 Patiala Punjab

[@user-ri5zk7gq7l]

ans-option b

[@vishwambhardeshmukh6643]

Mam am very perfectly chapter

[@user-uu6ue6oy9t]

❤❤

[@bhavyenarang5230]

(b) √12

[@ManojKumar-uh1ve]

😮❤❤❤

[@monalishanayak2113]

Is -3/+5 positive or negative rational number I think it's negative Because negative+ positive=negative Am i right

[@TripleThreatTV221]

its negative because irrespective of where the negative sign is - numerator or denominator the entire rational number is considered under negative but if both the numerator and denominator have negative, then we can cancel out negative-negative and get positive

[@sasankroshan2776]

how the hell r u even grade 9 bro seriously

[@alisha819]

Hiiiiii ma'am❤❤

[@sunitaptasad4245]

Yes

[@Sujalnegi9A29-gn2vl]

😊😊😊

[@perumaln2956]

I am seeing ur channel first time I am understanding clearly mam thank u..

[@mayanksinha4361]

1 completed 1k views

[@k-editsentertainment8212]

Please mam session 2 plz 🙏🙏

[@shiningstarjai2593]

👍👍👍👍👍

[@sanchitasenkauri]

Hello, I'm Aharshi! The answer to the homework question is √12 because it is not a square number and the value is never ending!

[@BYJUSClass910]

Great! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍

[@athashridakhane667]

Hayy Hii

[@user-fn3px7rr3k]

Hi​@@athashridakhane667

[@honeywhithchrist5716]

Hello😮😮😮

[@user-ug8um3bq9k]

0 is the integer

[@harshbatth907]

Hlo ur vry nyc thx to clear all doubts

[@harshbatth907]

Yes ma'am ur vry nyc teacher

[@sadimeera6441]

👍👍👌

[@sriprasannabalajisr4402]

Option a

[@LimasWishah]

Thank u❤❤❤

[@prasanshasingh1116]

Ans to homework - b. √12 it's decimal expantion is irrational and all other option have a value as rational no .

[@BYJUSClass910]

Great! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍

[@nandaprem3286]

Is clear

[@maheshamma.k3967]

whole numbers

[@BYJUSClass910]

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[@user-bg7pj5xn8w]

😊😊😊😊😊😊😊😊😊

[@manyahasrajani6186]

session for the next chapter 1 session will take place on?

[@sunitaptasad4245]

Got it sir 👍👍

[@sailajavenkatpotnuri3474]

Hi mam

[@jyothireddy7381]

Hi

[@user-np9rr1no9m]

You make every concept very easy 🙂

[@ailiancepradhan4031]

Hii mam

[@akaquireknowledgebykundank2316]

3

[@SharadaDevi-ce1oo]

🎉

[@sukhmandhaliwal1926]

Hello mam khushnoor kaur

[@praveebabe-ch1pn]

The minus as whole

[@nandaprem3286]

D ans

[@manjukumari1324]

4/7 dono ko 3 se multiple ka gya hai

[@manjukumari1324]

Whh

[@user-ug8um3bq9k]

positive

[@VeeraBshs-qh6xb]

Hii I am supriya

[@Divyaaungrish]

The answer will be root 12

[@BYJUSClass910]

Great Job! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍

[@pravaghosh8068]

Ma'am what is the difference between fractions and rational numbers

[@TechGamingMalayalam]

Fractions can be written as in the form of a/b where 'a' and 'b' are any Whole Number and 'b' is not equal to Zero (0) where as in Rational numbers it is in the form of p/q , where 'p' and 'q' are any Integers and 'q' not equal to Zero. That is in fractions we can only use whole numbers and in rational numbers we can use integers.

[@pravaghosh8068]

Oo Ok Thank you very much

[@TechGamingMalayalam]

@@pravaghosh8068 :D

[@kuttythamizhankowshik]

Rational number can be negative but fraction is always positive

[@sachinsadhnasaxenasachinsa5421]

Gauri saxena is class 8 th b

[@educationeducators3489]

Nice teaching

[@BYJUSClass910]

Thanks a lot, subscribe our channel for more Amazing Sessions!🤗

[@aditisingh2454]

~I have a doubt ~

[@Studies187]

-1

[@aarushidhingra8661]

Hello, I am Aarushi! The answer of the homework question is part (b) √12 which is a irrational number because it is not the square root of any number and it is never ending.

[@BYJUSClass910]

Great Job! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍

[@nandaprem3286]

Mam

[@aditisingh2454]

*if 0 is not a natural number then how is it possible that whole numbers are from 1 to inginite

[@vasanthinair4436]

It is because 0 is a whole number and not a natural numbers. Whole numbers start from 0 and natural numbers start from 1

[@vijayjha8421]

B

[@BYJUSClass910]

Great! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍

[@samreensam9687]

Maam is √5 is a perfect square

[@sunnyreddy6056]

hi

[@Veer-gc2xo]

Home work answer B

[@BYJUSClass910]

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[@reenasony2983]

A

[@jaykaransingh8506]

😊😊😊😊😊😊😊😊

[@narutoworld928]

Who can l contact in Byjus answer in reply thank you

[@cliffspringers928]

hello mam the answer for H.W is option B because it is not the square root of anything and you class was very easy to understand😍👍👍

[@srpatilpatil8592]

Yes mam HW answer is B option

[@ManojKumar-uh1ve]

A part

[@preetigarg717]

MAM PLZ TELL IN HINDI

[@aditisingh2454]

*hello*

[@rathideviv8723]

4/7

[@Studies187]

✔

[@sakshambhardwaj4019]

Hlo mam

[@divyajain-fx7tz]

D= -1

[@anushkagulhane4658]

HELLO MYSELF ANUSHKA GULHANE , ANSWER FOR TODAY'S HOMEWORK QUESTION IS (B) , BECAUSE A) IS √16=4 , B) IS AN IRRATIONAL AND IT HAS NO SQUARE ROOT C) √100 =10 D) IS =(√12/3)=2

[@BYJUSClass910]

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[@reenasony2983]

A

[@user-gy8jz3jm5t]

Ok

[@sadanakhalid3567]

Home work ans is : root 12

[@dndadu6903]

Please egan explain mam

[@amindeshmukh2958]

D

[@mahisharma8422]

Can you teach in hindi

[@chvictoria9763]

the answer for the homework question is b , because a and c are perfect squares . It is not d beccause it is written in the form of p/q