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Ex 12.2, 1 - Chapter 12 Class 7 Algebraic Expressions
Last updated at Oct. 25, 2021 by Teachoo
Addition and Subtraction of Algebraic Expressions
Chapter 12 Class 7 Algebraic Expressions
Concept wise
- Definitions
- Terms, Factors and Coefficients
- Monomials, Binomials, Trinomials
- Like and unlike terms
-
Addition and Subtraction of Algebraic Expressions
- Finding value of expression
- Number patterns
Transcript
Ex 12.2, 1 Simplify combining like terms: (i) 21b – 32 + 7b – 20b 21b − 32 + 7b − 20b = 21b + 7b − 20b − 32 = b (21 + 7 − 20) − 32 = b (28 − 20) − 32 = b (8) − 32 = 8b − 32
