NCERT - 8 - Maths :: Algebraic Expressions and Identities

Go To: NCERT-Mathematics-Grade 8

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• Course Content
• Textbook
• Teaching Learning Resources

Course Content / Subtopic list:

1. What Are Expressions, Terms Factors And Coefficients
2. Monomials Binomials And Polynomials
3. Like And Unlike Terms
4. Addition And Subtraction Of Algebraic Expressions
5. Multiplication Of Algebraic Expressions
6. Multiplying A Monomial By A Monomial
7. Multiplying A Monomial By A Polynomial
8. Multiplying A Polynomial By A Polynomial
9. What Is An Identity, Shared Identities, Applying Identities

[Author - Kripa S]

http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0853-Ganit/Chapter_9/index.html (NCERT Hindi Medium)

http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0852-Mathematics/9/index.html (NCERT English Medium)

https://drive.google.com/open?id=0BzNF2YyqQxJ-bWl5WmczT2c4MWc (JEPC Board) (Hindi Medium)

Lesson Plan

[Author - Kripa S]

Objective: Revise algebraic concepts, learn operations on expressions, learn about identities

Subtopics to be covered:

- Revise terms, types of expressions

- Add, subtract polynomials

- Multiply two expressions using distributive property

- Standard identities

Learning Outcome:

- Students know to classify algebraic expressions

- They can add, subtract, multiply two expressions

- They can solve problems using standard algebraic identities

Videos

[Contributor - Rishi Mazumdar]

(Source - Khan Academy)

https://hi.khanacademy.org/math/in-eighth-grade-math/algebraic-expressions-identities (Hindi - Algebraic Expressions and Identities)

Images

[Author - Kripa S]

http://3.bp.blogspot.com/-Kb8C_ggOpzg/U_rIoQpXw9I/AAAAAAAABfA/I-yRpR4d-eM/s1600/1.12.png (algebraic expressions and terms)

http://www.mathscore.com/math/free/lessons/mathTips/algebraicTerms.gif (terms of expressions)

http://3.bp.blogspot.com/-Kb8C_ggOpzg/U_rIoQpXw9I/AAAAAAAABfA/I-yRpR4d-eM/s1600/1.12.png (types of terms)

http://tutorial.math.lamar.edu/Classes/Alg/Polynomials_files/eq0002MP.gif (degree of expression)

http://www.aplustopper.com/wp-content/uploads/2016/09/Algebraic-Identities.png (identities)

http://s3.mnimgs.com/img/shared/discuss_editlive/2315393/2012_08_23_12_13_42/wumdmxbq_5989364557219336072.png ( formula to simplify expressions)

Activities

[Contributor - Apoorva Shetty]

1. The class should be divided in three groups xy2,x2y,x2y2.

2. Each child should be assigned the group randomly along with an integer co-efficient. (Eg. 9x2y2,6xy2 etc.)

3. They need to find their team-mates and tally the total sum of the group.

4. The teacher can verify this and whichever team can get the correct tally the fastest wins.

5. You can also divide the class in this way to form polynomial expressions and add/multiply them.

Additional Aids

[Author - Dr Nikitha Narayan]

https://drive.google.com/open?id=0BzNF2YyqQxJ-a3pKYUp2bVVRRjA

Transliteration

[Contributor - Suwetha]

Term	Transliterated Term	Translated Term
Expressions	एक्सप्रेशंस	व्यंजक
Terms	टर्म्स	पद
Factors	फैक्टर्स	गुणनखंड
Coefficients	कोएफ़िशिएंट्स	गुणांक
Monomials	मोनोमियल्स	पदी
Binomials	बैनोमियल्स	द्विपद
Polynomials	पोलीनोमियल्स	बहुपद
Like term	लइक टर्म	समान पद
Unlike term	अनलइक टर्म	असमान पद
Identity	आइडेंटिटी	सर्वसमिका
Equality	इक्वलिटी	समिका
Variables	वेरिएबल्स	चर
Constant	कांस्टेंट	अचर
Trinomials	ट्रिनोमियल्स	त्रिपदी

Worksheets

[Author - Dr Nikitha Narayan]

https://drive.google.com/open?id=0BzNF2YyqQxJ-YjVOaEZRbkdWRzA

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