NCERT class 8 mathematics chapter 8– “Algebraic Expressions and Identities” teaches us that expressions are formed from variables and constants. Terms are added to form expressions. For the CBSE exams, practice multiple-choice questions (MCQs) to prepare for the objective questions. We have provided Class 8 MCQ Questions on “Algebraic Expressions and Identities” paired with comprehensive explanations. CBSE is emphasizing the role of MCQs as they assist in understanding the concepts completely.
As compared to subjective questions, MCQs are very different so practicing and understanding how to get appropriate answers in MCQs is very essential. To revise the main concepts, students should practice all the MCQs with the answers given. This will also help them familiarize themselves with the kinds of questions that might appear in the board exams.
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Topics covered in “Algebraic Expressions and Identities”
- Addition and Subtraction of Algebraic Expressions
- Multiplication of Algebraic Expressions
- Multiplying a Monomial by a Monomial
- Multiplying two Monomials
- Multiplying three or more Monomials
- Multiplying a Monomial by a Polynomial
- Multiplying a Monomial by a Binomial
- Multiplying a Monomial by a Trinomial
- Multiplying a Polynomial by a Polynomial
- Multiplying a Binomial by a Binomial
- Multiplying a Binomial by a Trinomial
CBSE Class 8 Mathematics Algebraic Expressions and Identities MCQs – PDF Download
Answers –
Summary for NCERT class 8 mathematics chapter 8 – “Algebraic Expressions and Identities”
- Expressions are formed from variables and constants.
- Terms are added to form expressions. Terms themselves are formed as product of factors.
- Expressions that contain exactly one, two and three terms are called monomials, binomials and trinomials respectively.
- In general, any expression containing one or more terms with non-zero coefficients (and with variables having non- negative integers as exponents) is called a polynomial.
- Like terms are formed from the same variables and the powers of these variables are the same, too. Coefficients of like terms need not be the same.
- While adding (or subtracting) polynomials, first look for like terms and add (or subtract) them; then handle the unlike terms.
- There are number of situations in which we need to multiply algebraic expressions: for example, in finding area of a rectangle, the sides of which are given as expressions.
- A monomial multiplied by a monomial always gives a monomial.
- While multiplying a polynomial by a monomial, we multiply every term in the polynomial by the monomial.
- In carrying out the multiplication of a polynomial by a binomial (or trinomial), we multiply term by term, i.e., every term of the polynomial is multiplied by every term in the binomial (or trinomial). Note that in such multiplication, we may get terms in the product which are like and have to be combined.
Best Reference Books for Class 8 Mathematics
- NCERT Textbook + Exemplar Problems Solutions Mathematics
- NCERT at your Fingertips Mathematics
- Foundation Course Mathematics
- Practice-cum-Workbook Mathematics
- Integrated Learning Mathematics
