MATHEMATICS CLASS 8 by Mridu Dhingra https://padlet.com/mridudhingraa/lvk56sdyitxx Made with a dash of wit en-us 2020-03-31 09:05:28 UTC 2023-01-24 01:34:09 UTC hello@padlet.com Class 8 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/485124255 Rational numbers     
Video 1
 https://drive.google.com/open?id=1hMyWkcChw7FGco-kUT_a-iWRlNBs5maL]]> 2020-03-31 18:09:11 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/485124255 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/485237121 2020-03-31 19:06:32 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/485237121 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/485974033 Rational numbers
Worksheet 1]]> 2020-04-01 07:54:25 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/485974033 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/487083349 Rational numbers 
Video 2
https://drive.google.com/file/d/1OjkkraSNX4nnF42R_NUbrnzH1gqAbi4j/view?usp=drivesdk]]> 2020-04-01 16:06:33 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/487083349 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/494100890 WORKSHEET 1 ANSWERS]]> 2020-04-06 07:02:29 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/494100890 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498114812 WORKSHEET 3
(For Practice)]]> 2020-04-08 07:08:51 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498114812 Ex 1.1 & 1.2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498118864 2020-04-08 07:12:07 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498118864 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498727185 2020-04-08 13:48:28 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498727185 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498746205
Notes on Rational Numbers--


 Rational Number- Any number that can be expressed in the form of p/q, where p and q are integers and q is not equal to 0, is known as rational number.


The collection or group of rational numbers is denoted by Q.


Properties of a Rational Number


• Closure-Rational numbers are closed under addition, subtraction and multiplication. For eg.- If p and q are any two rational numbers, then the sum, difference and product of these rational numbers is also a rational number. This is known as the closure law .


 Commutativity- Rational numbers are commutative under addition and multiplication. If p and q are two rational numbers, then:
 Commutative law under addition says-p + q = q +p.


Commutative law under multiplication says- pxq= qxp


Note- Rational numbers, integers and whole numbers are commutative under addition and multiplication. Rational numbers, integers and whole numbers are non commutative under subtraction and division.


Associativity- Rational numbers are associative under addition and multiplication. If p,q and r are rational numbers, then:
 Associative property under addition: p + (q + r) = (p + q) +r 


Associative property under multiplication: px(qxr)=(pxq)xr


Role of zero and one-0 is the additive identity for rational numbers. 1 is the multiplicative identity for rational numbers.


• Multiplicative inverse-If the product of two rational numbers is 1, then they are called multiplicative inverse of each other.
 Eg. 4/9*9/4 = 1



]]> 2020-04-08 13:57:25 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/498746205 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/508593159 NCERT BOOK
CHAPTER 2
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LINEAR EQUATIONS IN ONE VARIABLE]]> 2020-04-15 14:27:51 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/508609521 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/508967176 Introduction video of linear equations in one variable

https://drive.google.com/file/d/1_U4DMVcUsjSuLcAFrwlSYEPMHn-WIfGS/view?usp=drivesdk]]> 2020-04-15 16:50:23 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/508967176 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524728945 Linear equations in one variable
  Homework Solution for Ex 2.1 ]]> 2020-04-23 04:32:41 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524728945 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524730721 Linear equations in one variable
Ex2.2]]> 2020-04-23 04:34:26 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524730721 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524734464 Linear equations in one variable
Homework solution for Ex2.3

]]> 2020-04-23 04:38:02 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524734464 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524736841 Linear equations in one variable 
Ex 2.4]]> 2020-04-23 04:40:14 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524736841 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524737163 Linear equations in one variable
Ex 2.5
]]> 2020-04-23 04:40:35 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524737163 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524737612 Linear equations in one variable
Ex2.6
]]> 2020-04-23 04:41:04 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524737612 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524746849 Homework
Worksheet 5]]> 2020-04-23 04:50:13 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/524746849 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/538117914 Note: Complete Chapter 1 and Chapter 2 in Maths Notebook .]]> 2020-04-29 04:54:11 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/538117914 Lecture 2 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/538167991 Answer key
Worksheet 2

]]> 2020-04-29 05:45:25 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/538167991 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/538592363 Revision 
worksheet 6
Topics: Rational Numbers & Linear equations in one variable.]]> 2020-04-29 09:25:32 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/538592363 Understanding Quadrilaterals. Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/541777639 2020-04-30 12:36:09 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/541777639 Video Understanding Quadrilaterals Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/541982737 https://drive.google.com/file/d/1fzQO6nPY8LvuvUqOkuxe4RAt-bl2kBGa/view?usp=drivesdk]]> 2020-04-30 13:51:10 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/541982737 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571697619 Topic: Understanding Quadrilaterals
Ex 3.1 & Ex 3.2]]> 2020-05-14 04:46:06 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571697619 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571698125 Worksheet 7
Topic Understanding Quadrilaterals]]> 2020-05-14 04:46:45 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571698125 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571699012 2020-05-14 04:47:46 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571699012 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571720399 2020-05-14 05:15:46 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/571720399 Lecture 5. Understanding Quadrilaterals mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/572945159 Video 
https://drive.google.com/file/d/1phKXyqesWUFuNUPXgTNdz7NcuhBQEQiV/view?usp=drivesdk]]> 2020-05-14 15:14:58 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/572945159 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586163437 Worksheet 8]]> 2020-05-21 02:11:53 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586163437 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586169476 Ex 3.3 & Ex 3.4
Understanding Quadrilaterals

]]> 2020-05-21 02:18:25 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586169476 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586193783 2020-05-21 02:45:09 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586193783 Lecture 5 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586669050 Answer key(worksheet 7)]]> 2020-05-21 10:06:18 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/586669050 Lecture 3 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648257790 2020-07-06 12:28:47 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648257790 Lecture 3 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648259140 Exponents and Powers
Worksheet]]> 2020-07-06 12:30:50 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648259140 Lecture 3 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648264103 Exponents and Powers]]> 2020-07-06 12:37:23 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648264103 Lecture 3 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648272604 Ex 12.1]]> 2020-07-06 12:51:44 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648272604 Lecture 8 Video mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648315077 Exponents and Powers
https://drive.google.com/file/d/1xcYhdM46oQbAOmFWO6LB1_5Dabb4ovAs/view?usp=drivesdk
]]> 2020-07-06 13:46:34 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648315077 Lecture 3 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648325084 Exponents and Powers]]> 2020-07-06 13:58:12 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/648325084 Lecture 9 Direct and Inverse Proportions mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659092686 Worksheet]]> 2020-07-21 08:29:10 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659092686 Lecture 9 Video (Direct and Indirect Proportions) mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659771783 https://drive.google.com/file/d/1OaRmX7u2tMGc7lZkf_YqoD7me02t3755/view?usp=drivesdk]]> 2020-07-22 03:03:42 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659771783 Lecture 9 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659772613 2020-07-22 03:04:56 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659772613 Lecture 9 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659775297 2020-07-22 03:09:08 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/659775297 Lecture 10 Squares and square roots mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681812219 WORKSHEET]]> 2020-08-16 14:31:32 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681812219 Lecture 10 Squares and square roots mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681812279 2020-08-16 14:31:45 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681812279 Lecture 10 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681812482 2020-08-16 14:32:17 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681812482 Lecture 10 Video Squares and square roots. mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681825430 https://drive.google.com/file/d/1Km_syJLZcwjHBZ6IPtgjBgkivoztys-Z/view?usp=drivesdk]]> 2020-08-16 15:07:28 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681825430 Lecture 10 Squares and square roots mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681828326 2020-08-16 15:16:09 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/681828326 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718356977 2020-09-03 15:43:47 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718356977 Lecture 11. Cubes and cube roots mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718398844 2020-09-03 15:53:27 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718398844 Lecture 11. Cubes and cube roots mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718402094 2020-09-03 15:54:16 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718402094 Lecture 11 Cubes and cube roots mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718452269 2020-09-03 16:06:09 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718452269 Lecture 11 Cubes and cube roots mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718535540 WORKSHEET]]> 2020-09-03 16:24:37 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/718535540 Lecture 4 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755341481 Solutions 
Chapter -- Algebraic Expression and Identities]]> 2020-09-17 14:16:23 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755341481 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755489809 2020-09-17 14:45:52 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755489809 Lecture 4 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755727341 2020-09-17 15:33:46 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755727341 Lecture 4 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755768001 Worksheet
Chapter-- Algebraic Expressions and Identities]]> 2020-09-17 15:41:49 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/755768001 Lecture 13 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873811967 FACTORISATION
NCERT SOLUTIONS]]> 2020-10-29 16:11:54 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873811967 Lecture 13 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873817468 Practical Geometry
NCERT SOLUTIONS]]> 2020-10-29 16:13:00 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873817468 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873835352 2020-10-29 16:16:41 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873835352 mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873836098 2020-10-29 16:16:50 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/873836098 Lecture 14 Data Handling mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/966158155 https://drive.google.com/file/d/1RAtKTt5m1aEbI0-QgJq4rNaB9gHxNjRd/view?usp=drivesdk]]> 2020-11-27 18:26:24 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/966158155 Lecture 14 Data Handling mridudhingraa https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/966160373 https://drive.google.com/file/d/1RBWN86ux4ksGoH3EOCrVzgdYLNO73bx1/view?usp=drivesdk]]> 2020-11-27 18:27:58 UTC https://padlet.com/mridudhingraa/lvk56sdyitxx/wish/966160373